All 228 Roofing Calculators
Every free roofing calculator on RoofAreaCalc, organized by category. From basic roof area to advanced structural loads — find the right tool for your project.
228 calculators · 12 categories · Free forever
Roof Area Calculator
Calculate the total surface area of your roof from building dimensions and pitch
basic Gable Roof Calculator
Calculate area, materials, and dimensions for a standard gable (A-frame) roof
basic Hip Roof Calculator
Calculate area and dimensions for a hip roof with slopes on all four sides
intermediate Roof Pitch Conversion Calculator
Convert between any two pitch formats: X:12 pitch, degrees, percentage, radians, and slope multiplier. Instant two-way conversion with pitch classification.
basic Flat Roof Calculator
Calculate area, drainage, and materials for flat or low-slope roofs
basic Roofing Square Calculator
Convert roof area to roofing squares (1 square = 100 sq ft)
basic Cross Gable Roof Calculator
Calculate area of two intersecting gable roofs at right angles including valley lengths and intersection geometry
intermediate L-Shaped Roof Calculator
Calculate total roof area for L-shaped floor plans — split sections with pitch adjustment and valley intersection geometry
intermediate Gambrel Roof Calculator
Calculate area and dimensions for a gambrel (barn) roof
intermediate Shed Roof Calculator
Calculate area and pitch for a single-slope shed or lean-to roof
basic Roof Overhang Calculator
Calculate eave and rake overhang dimensions and additional area
basic Roof Measurement Converter
Convert between roofing squares, bundles, square feet, and linear feet with pitch adjustment
basic Pyramid Roof Calculator
Calculate area of a 4-sided pyramid roof where all sides meet at a single apex point — for square structures, gazebos, and tower rooms
basic Cathedral Ceiling Area Calculator
Calculate interior surface area of a vaulted or cathedral ceiling for insulation, drywall, or paint estimation
basic Roof Area from Blueprint Calculator
Calculate true roof area from floor plan dimensions and pitch — input footprint shape and get slope-corrected area
basic Shed Dormer Calculator
Calculate shed dormer roof area, wall area, and framing materials — rafter length, sheathing sheets, and shingle bundles
intermediate Saltbox Roof Calculator
Calculate asymmetric saltbox roof area with different front and back slopes — rafter lengths and cut angles for both sides
intermediate T-Shaped Roof Calculator
Calculate total roof area for T-shaped floor plans including valley and ridge intersections at both junctions
intermediate Mansard Roof Calculator
Calculate area and dimensions for a mansard (French) roof with two slopes per side
advanced Dormer Calculator
Calculate dimensions and area added by roof dormers
intermediate Roof Footprint Calculator
Calculate the ground-level footprint area of your roof including overhangs
basic Gable End Area Calculator
Calculate the triangular wall area at gable ends for siding, painting, or cladding estimates
basic Roof Valley Length Calculator
Calculate the exact valley rafter length where two roof planes intersect — 3D geometry for any pitch combination
intermediate Dome Roof Calculator
Calculate hemispherical or partial-sphere roof area for observatories, round buildings, and architectural domes
intermediate Hexagonal Gazebo Roof Calculator
Calculate 6-sided gazebo roof area with six triangular panels from center peak — for pavilions and bandstands
basic Quonset Hut Roof Calculator
Calculate curved semi-cylindrical roof surface area, arc length, panel count, and end wall area for Quonset hut structures
intermediate Geodesic Dome Roof Calculator
Calculate panel counts, strut lengths, and covering area for 2V-6V geodesic domes — hubs, triangles, and materials
advanced Bay Window Roof Calculator
Calculate total area for 3-facet or 5-facet bay window roofs — facet areas, hip flashing lengths, and liner cost
intermediate Wrap-Around Porch Roof Calculator
Calculate total area for wrap-around porches — front run, side run, corner hip section, and post count
intermediate Dutch Gable Roof Calculator
Calculate area for a hybrid Dutch gable roof combining hip and gable elements
advanced Complex Roof Calculator
Calculate area for multi-section roofs with different pitches and shapes
advanced Conical Roof Calculator
Calculate cone-shaped roof area for turrets, silos, and round structures using radius, height, and slant height
intermediate Barrel Vault Roof Calculator
Calculate semi-cylindrical roof area for commercial buildings, barns, and Quonset huts using span, length, and rise
intermediate Jerkinhead Roof Calculator
Calculate area of a clipped gable (jerkinhead) roof — a gable end trimmed to a small hip for wind resistance
intermediate Hipped Dormer Calculator
Calculate hipped dormer area with 3 sloping planes — front face plus two triangular hip sides with ridge and hip rafter lengths
advanced Butterfly Roof Calculator
Calculate area and drainage for a V-shaped butterfly roof
intermediate Bonnet Roof Calculator
Calculate area of a bonnet (kicked eave) roof with steep upper slope and gentle lower slope extending as covered porch
intermediate Monitor Roof Calculator
Calculate area of a monitor roof — raised central section with windows on all 4 sides above two shed roof planes
intermediate Eyebrow Dormer Calculator
Calculate curved eyebrow dormer area using semi-ellipse geometry — barrel-curved sheathing and material estimation
advanced Sawtooth Roof Calculator
Calculate area for industrial sawtooth roofs with multiple ridges
advanced Roof Pitch Calculator
Calculate roof pitch from rise and run, convert between degrees, ratios, and percentages
basic Roof Slope Calculator
Calculate slope percentage and angle from roof measurements
basic Roof Angle Calculator
Convert roof pitch to degrees and calculate the exact angle of your roof
basic Roof Pitch Factor Table Calculator
Input any pitch 0.5:12 to 24:12 and get degrees, percentage, multiplier, rafter-per-ft, area increase, and material waste factor
basic Pitch Multiplier Calculator
Find the pitch correction factor to convert footprint area to actual roof area
basic Rise and Run Calculator
Calculate roof rise, run, and rafter length from any two measurements
basic Roof Pitch Chart & Reference
Complete reference chart of all standard roof pitches with angles, multipliers, and recommendations
basic Minimum Roof Pitch Calculator
Find the minimum recommended pitch for your roofing material
basic Steep Roof Calculator
Special considerations and calculations for steep-slope roofs (over 9:12)
intermediate Shingle Calculator
Calculate how many bundles of shingles you need for your roof
basic Metal Roof Calculator
Calculate metal roofing panels, trim, and fasteners needed
intermediate Asphalt Shingle Calculator
Calculate bundles, squares, and total cost for 3-tab ($90/sq, 20 yr), architectural ($120/sq, 30 yr), or designer ($200/sq, 50 yr) asphalt shingles
basic Shingle Brand Comparison Calculator
Compare GAF Timberline HDZ ($95/sq), Owens Corning Duration ($105/sq), CertainTeed Landmark ($100/sq), Atlas StormMaster ($90/sq), and IKO Cambridge ($85/sq) — total cost and cost per year side-by-side
basic Tile Roof Calculator
Calculate clay or concrete roof tiles needed with waste factor
intermediate Roof Underlayment Calculator
Calculate rolls of felt or synthetic underlayment for your roof
basic Roof Sheathing Calculator
Calculate plywood or OSB sheets needed for roof decking
basic Metal Roof Screw Calculator
Calculate exact screw count for metal roofing by panel type, roof area, and fastener spacing pattern
basic Corrugated Roof Panel Calculator
Calculate panel count accounting for side overlap and end overlap — uses coverage width, not nominal width
basic Hip & Ridge Cap Shingle Calculator
Calculate linear feet of hip and ridge lines, then estimate cap shingle bundles needed — 1 bundle covers 20 linear feet
basic Concrete Roof Tile Calculator
Calculate number of concrete tiles needed by roof area, tile size, overlap, and waste factor for flat, S-profile, and barrel tiles
basic Tin Roof Calculator
Calculate tin/galvanized steel roof panels using 26" coverage width — panel count, ridge cap, gable trim, and cost at $3-5/sqft
basic Impact Resistant Shingle Calculator
Calculate Class 4 (UL 2218) hail-resistant shingles — cost premium vs standard, insurance discount 5-28%, and break-even analysis
intermediate Torch-Down Roof Calculator
Calculate modified bitumen rolls for torch application — base + cap sheets, primer, propane tanks, and seam overlap
intermediate Spray Foam Roof Calculator
Calculate spray polyurethane foam coverage in board-feet, coating gallons, passes needed, R-value, and cost at $4-7/sqft
intermediate Shingle Comparison Calculator
Side-by-side cost and value comparison of 3-tab vs architectural vs designer shingles — total cost, lifespan (20/30/50 yr), wind rating (60/110/130 mph), and annual cost
basic Roof Decking Replacement Cost Calculator
Calculate sheets needing replacement at $75–95/sheet installed (4×8 OSB $35 + $40–60 labor) — per-sheet cost and total. Typical inspection finds 10–20% of deck needs replacement
basic Roof Tile Coverage Calculator
Calculate tiles per square foot by tile type (flat, barrel, S-tile, plain), hip/ridge cap tiles, pallets, and total weight
basic Roof Material Waste by Complexity Calculator
Determine waste percentage by roof type: simple gable 5–10%, cross gable 10–15%, hip 12–18%, complex 15–25% — order quantity and extra material cost
basic Roof Shingle Offset Calculator
Stagger offset per course: 6" for 3-tab, 6.5" for architectural shingles. Ensures no butt joint alignment, calculates courses to full pattern repeat and total shingle count.
basic Roof Metal Standing Seam Panel Width Calculator
Coverage per panel = pan width + seam height for 12", 16", or 18" pan options. Total panels needed, actual coverage, and aesthetic comparison of panel width options.
basic Roof Sealant Caulk Tube Calculator
Tubes needed: joint LF × bead width × bead depth / tube volume (10.3 oz ≈ 6 cu in). Adjustable waste factor (15% default). Coverage per tube in LF.
basic Tar Paper Rolls Calculator
15 lb felt = 432 sqft/roll, 30 lb = 216 sqft/roll. By roof area + double-layer for pitch < 4:12 + lap factor for accurate material estimate.
basic Roof Adhesive Cure Time Calculator
Cure time by temperature: 70°F=24 hr, 50°F=48 hr, 40°F=72 hr+ — covers EPDM contact cement, TPO seam, roofing cement, polyurethane, silicone, and shingle self-seal.
basic Roofing Nails Calculator
Calculate the number and weight of roofing nails needed
basic Ice & Water Shield Calculator
Calculate ice and water barrier membrane needed for eaves and valleys
basic Roof Waste Calculator
Calculate material waste factor based on roof complexity and hip/valley count
basic Roof Waterproofing Membrane Calculator
Calculate sheet or liquid waterproofing membrane quantities for flat roofs — coverage, primer, and overlap
intermediate Roofing Material Weight Comparison
Compare weights of different roofing materials side by side — interactive tool for structural decisions
basic Roof Paint Calculator
Estimate gallons of roof paint or primer needed based on surface area, paint type, and number of coats
basic Roof Batten Spacing Calculator
Calculate batten count and exact spacing for tile or slate roofs based on tile gauge and rafter length
intermediate Roof Felt Roll Calculator
Estimate felt underlayment rolls needed — 15-lb (400 sqft) or 30-lb (200 sqft) with pitch and overlap adjustments
basic Metal Roof Panel Length Calculator
Calculate individual panel cut lengths from roof span, pitch angle, and overhang — formula: L = (span/2 + overhang) / cos(angle)
intermediate Modified Bitumen Roof Calculator
Estimate rolls, adhesive, and cost for mod-bit flat roof installations — torch-applied or self-adhering systems
intermediate Clay Tile Roof Weight Calculator
Calculate total dead load for different clay tile profiles — Spanish S, Mission barrel, French flat, and concrete tiles
basic Polycarbonate Roof Panel Calculator
Calculate polycarbonate panel quantity, purlin spacing, and thermal expansion gaps for patio covers, greenhouses, and carports
basic Cedar Shake Coverage Calculator
Calculate bundles of cedar shakes or shingles needed factoring exposure rate, coursing, and hip/valley waste allowance
intermediate Synthetic Slate Calculator
Calculate synthetic composite slate tiles needed — pieces per square by exposure, bundles, nails, and cost at $4-6/sqft installed
basic Copper Roof Calculator
Calculate copper sheets (16oz/20oz), soldering material, and cost at $15-25/sqft — with patina timeline estimates
intermediate Zinc Roof Calculator
Calculate zinc panels at 16.5" coverage, expansion clips, and cost at $12-20/sqft — with weathering/patina factors
intermediate Rubber Roof Calculator (EPDM)
Calculate EPDM membrane area with 6" seam overlap, bonding adhesive gallons at 55 sqft/gal, and seam tape rolls at 50 ft/roll for flat and low-slope roofs
basic Spanish Tile Roof Calculator
Calculate S-tile or mission barrel tile count (80–90 tiles/sq), total weight (9–12 lbs/tile), mortar bags, and material cost for Spanish tile roofs
intermediate Recycled Rubber Shingle Calculator
Calculate pieces (16.6 sqft each), bundles (6 pcs), weight (3.5 lbs/sqft), and material cost ($400–600/sq) for Class 4 impact-rated recycled rubber shingles with 50-year lifespan
basic Metal Roof Panel Overlap Calculator
Calculate end-lap and side-lap requirements by panel profile and pitch, plus total panels, rows, and overlap material waste
intermediate Roof Felt Overlap Calculator
Calculate headlap and side overlap by underlayment type and pitch, courses needed, rolls required, and coverage efficiency
basic Roof Shingle Starter Course Calculator
Calculate starter strip linear feet, rolls or bundles needed, and material cost — roll, bundle, or cut-from-shingle options
basic Roof Metal Panel Cutting Calculator
Cut list: panel lengths from ridge to eave with overhang and ridge overlap. Scrap optimization per stock sheet length. Total sheet metal sqft including waste factor.
intermediate Impact Zone Fastener Calculator
Hail-prone zone fastening: enhanced 6 nails per shingle. Premium nail length 1.25". Cost vs standard 4-nail pattern. Nail box and total count.
basic Roof Deck Fastener Pull-Out Calculator
Pull-out resistance by fastener type: smooth shank 80 lbs, ring shank 200 lbs, structural screw 350 lbs — capacity vs wind uplift demand per 4×8 sheet.
intermediate Slate Roof Calculator
Calculate natural or synthetic slate tiles needed for your roof
intermediate Wood Shake Calculator
Calculate cedar shakes or wood shingles needed for your roof
intermediate TPO Roof Calculator
Calculate TPO single-ply membrane for commercial flat roofs
intermediate EPDM Roof Calculator
Calculate EPDM rubber roofing membrane for flat roofs
intermediate Roof Coating Calculator
Calculate roof coating coverage for restoration and waterproofing
basic Standing Seam Roof Clip Calculator
Calculate clip quantity and spacing by panel width, wind zone, and snow load — double density at perimeter zones
intermediate Zinc Strip Moss Prevention Calculator
Calculate linear feet of zinc strip needed — strips at each ridge and every 15 feet down the slope for moss prevention
basic Rubber Roof Patch Calculator
Calculate EPDM or TPO patch material, primer, and adhesive needed for flat roof repairs by number and size of patches
basic Roof Tile Mortar Calculator
Calculate mortar mix quantity for bedding and pointing ridge tiles, hip tiles, and verge tiles
basic Rubber Roof Adhesive Calculator
Calculate gallons of EPDM or TPO adhesive and bonding cement needed by membrane area, substrate type, and application method
basic Fiber Cement Roof Calculator
Calculate fiber cement panels or sheets needed — coverage per panel, fastener count, and total weight at 2.5 lbs/sqft
intermediate Roof Membrane Seam Calculator
Calculate total seam length, hot-air weld time at 8 ft/min, T-patch count, and seam labor cost for single-ply membranes
intermediate Roof Slate Sizing Calculator
Calculate slate exposure, slates per square, and total count — with minimum pitch warnings by slate size
intermediate Built-Up Roof (BUR) Calculator
Calculate felt rolls for 2–5 ply BUR systems, hot asphalt at 27.5 lbs/sq/ply, and gravel cap at 400 lbs/sq for flat commercial and low-slope roofing
intermediate Roof Metal Panel Rib Spacing Calculator
Rib and corrugation spacing by profile: R-Panel (12" major, 3" minor), PBR (12" OC), corrugated (2.67" pitch), standing seam (16" OC). Panel count for roof width.
basic PVC Roof Calculator
Calculate PVC membrane roofing for flat and low-slope roofs
intermediate Rolled Roofing Calculator
Calculate mineral-surface rolled roofing for sheds and low-slope roofs
basic Thatched Roof Calculator
Calculate bundles of thatch (water reed or straw) needed by area, thickness, and ridge length for heritage and eco builds
basic Rafter Calculator
Calculate rafter length, birdsmouth cut, and tail length for your roof
intermediate Roof Truss Calculator
Calculate truss dimensions, spacing, and quantity for your roof
advanced Snow Load Calculator
Calculate snow load on your roof based on location and roof geometry
intermediate Roof Weight Calculator
Calculate total roof weight by material type — dead load per square foot for structural assessment
basic Rafter Span Calculator
Look up maximum rafter span from AWC tables — by species, grade, spacing, and live load with L/240 and L/360 deflection checks
advanced Roof Lumber Calculator
Full framing lumber takeoff — rafter count, ridge board, collar ties, blocking, total board feet, and cost at current lumber prices
intermediate Rafter Span Calculator
Look up maximum rafter span from AWC tables — by species, grade, spacing, and live load with deflection checks
advanced Roof Height Calculator
Calculate peak roof height above ground from wall height, span, and pitch — for permits, zoning setbacks, and ladder selection
basic Roof Load Calculator
Calculate dead load, live load, and total roof load capacity
advanced Roof Deck Load Capacity Calculator
Check if your roof can support HVAC units, solar panels, or a rooftop deck — max PSF capacity analysis
intermediate Reroofing Weight Compatibility Calculator
Check if your roof structure can handle a new layer over existing shingles — overlay weight analysis per code
intermediate Hip Rafter Length Calculator
Calculate the diagonal hip rafter length from building span, width, and roof pitch including overhang
intermediate Roof Truss Spacing & Count Calculator
Calculate number of trusses needed and optimal spacing — 16" OC vs 24" OC based on load requirements
basic Roof Snow Guard Spacing Calculator
Calculate number and placement pattern of snow guards based on pitch, panel width, and ground snow load per ASCE 7
intermediate Hip Roof Framing Calculator
Complete hip roof framing package — common rafters, hip rafters, jack rafters, ridge board, total board feet and lumber cost
advanced Shed Roof Framing Calculator
Calculate complete shed roof framing — rafter count, ledger board, top plate, blocking, and total board feet
intermediate Roof Tie-Down Calculator
Calculate hurricane tie/strap requirements per wind zone — quantity, type (H2.5/H10/H10S), and nails per Simpson Strong-Tie specs
intermediate Gable Roof Framing Calculator
Calculate common rafters, ridge board, ceiling joists, and collar ties — total board feet and lumber cost for gable framing
intermediate Cathedral Ceiling Rafter Calculator
Size cathedral ceiling rafters for span, insulation depth, vent channel clearance, and structural ridge beam requirements
intermediate Roof Ceiling Joist Size Calculator
Size ceiling joists by span, spacing, and species — AWC table lookup for attic storage load with joist count and board feet
intermediate Roof Wind Speed to Pressure Calculator
Convert design wind speed to pressure: q = 0.00256 × Kz × V². C&C pressures by roof zone (field/edge/corner) with GCp factors and fastener resistance recommendation.
advanced Roof Ridge Height Calculator
Ridge height above top plate = (span / 2) × (pitch / 12). Calculates run, ridge height, and pitch angle from building span and roof pitch.
basic Roof Structural Ridge Beam Calculator
Structural ridge required for vaulted ceilings (no ceiling joists). Required depth from span, tributary load, Fb, and beam width. Next standard lumber size recommendation.
advanced Roof Plywood Layout Calculator
Optimal 4×8 sheet layout on roof plane: full sheets, stagger pattern, partial rows at ridge and eave, cut waste %, and total sheets with 10% waste factor.
intermediate Roof Wind Zone Fastener Calculator
Fastener schedule by ASCE 7 wind zone: Zone 1 field 6/sq, perimeter 8/sq, corner 10/sq. Zones 2 and 3 enhanced schedules for coastal and high-wind areas. Total fasteners required.
intermediate Wind Load Calculator
Calculate wind uplift forces on your roof based on location and exposure
advanced Birdsmouth Cut Calculator
Calculate birdsmouth notch dimensions for rafter-to-wall plate connection
intermediate Roof Span Calculator
Calculate maximum allowable roof span based on lumber size and species
intermediate Jack Rafter Length Calculator
Calculate jack rafter lengths and common difference for hip and valley roof intersections
advanced Flat Roof Ponding Calculator
Calculate ponding risk on flat and low-slope roofs using drainage slope, area, and rainfall data to determine if tapered insulation is needed
intermediate Wind Uplift Resistance Calculator
Calculate wind uplift forces on roof sections per ASCE 7 — outputs required fastener patterns and connection strengths by zone
advanced Roof Truss Load Table Calculator
Calculate allowable truss loads by span, spacing, pitch, and lumber grade — dead load, live load, and total capacity
advanced Metal Roof Purlin Calculator
Calculate purlin size by span table, spacing by panel type, total linear feet, and cost for metal roof support framing
advanced Roof Beam Calculator
Size headers and beams for roof openings (skylights, chimneys, dormers) — tributary load × span, depth rule span/12 for DF-L, and minimum lumber or LVL size
intermediate Roof Joist Calculator
Size flat roof joists by span, spacing, and load — AWC table approximations: 2×8 spans 13 ft, 2×10 spans 16 ft, 2×12 spans 20 ft at 16" OC with total joist count and board feet
intermediate Roof Tile Weight Calculator
Calculate dead load by tile type — concrete (9–12 psf), clay (8–15 psf), slate (7–10 psf), composite (2–4 psf) — with structural capacity check against existing framing rating
basic Gambrel Roof Framing Calculator
Calculate gambrel truss dimensions — upper and lower rafter lengths, break point height, truss count, and total lumber needed
intermediate Roof Decking Span Calculator
Max unsupported span for OSB and plywood by thickness using APA span ratings: 7/16"=16", 15/32"=24", 19/32"=32", 23/32"=48". Includes load adjustment and deflection.
basic Roof Live Load Calculator
IRC/ASCE 7 live load reduction: Lr = 20 × R1 × R2. R1 from tributary area (200–600 sq ft), R2 from roof pitch above 4:12. Min 12 psf governs. Accessible roofs use 40 psf.
advanced Roof Rafter End Block Calculator
Calculate 2×4/2×6 blocks between rafters at fascia — count = rafter_count − 1. Board feet, total LF, and material cost for bird blocking at eave.
basic Ridge Beam Calculator
Calculate ridge beam size based on span, load, and rafter configuration
advanced Purlin Calculator
Calculate purlin size, spacing, and quantity for roof support
intermediate Flat Roof Joist Spacing Calculator
Compare maximum spans for 12", 16", and 24" OC joist spacing for 2×8, 2×10, and 2×12 lumber with load capacity comparison for flat roof design
intermediate Roof Diaphragm Calculator
Calculate roof sheathing diaphragm shear capacity vs demand for lateral wind and seismic loads per ASCE 7 and AWC SDPWS
advanced Mansard Roof Framing Calculator
Calculate mansard roof framing — steep lower rafter length, upper deck dimensions, rafter counts, and total lumber requirements
advanced Gable Ladder Framing Calculator
Calculate lookout (outrigger) count, fly rafter length, and total lumber for gable rake overhang ladder framing
intermediate Roof Panel Clip Load Calculator
Standing seam clip uplift load = wind_psf × panel_width × clip_spacing. Compare to rated clip capacity (75–150 lbs), utilization ratio, and maximum allowable clip spacing.
intermediate Collar Tie Calculator
Calculate collar tie dimensions and placement for rafter reinforcement
advanced Roof Replacement Cost Calculator
Estimate total roof replacement cost including materials, labor, and disposal
basic Roof Overlay vs Tear-Off Calculator
Compare costs, weight implications, and code compliance of overlaying a second shingle layer vs full tear-off replacement
basic Roof Project Cost Estimator
All-in roofing cost: materials + labor + tear-off + decking repair + dumpster + permit + scaffolding + 10% contingency — master cost estimator with cost per sq ft
basic Roof Repair Cost Calculator
Estimate repair costs for leaks, damaged shingles, and other common issues
basic Metal Roof Cost Calculator
Compare costs of standing seam, corrugated, and metal shingle roofing
basic Shingle Cost Calculator
Estimate asphalt shingle costs by type: 3-tab, architectural, and designer
basic Roofing Project Timeline Calculator
Estimate how many days your roofing project will take based on roof size, pitch, material, and crew size
basic Standing Seam Roof Cost Calculator
Full installed cost for standing seam metal — panels, clips, trim, labor at $3-6/sqft, total with overhead
intermediate Roof Estimate for Real Estate
Calculate remaining roof life, replacement cost, and negotiation credit for home buyers, sellers, and realtors
basic Flat Roof Cost Calculator
Compare EPDM ($4–8/sqft), TPO ($5–10), PVC ($6–12), Modified Bitumen ($4–8), and BUR ($5–10) flat roofing systems side-by-side with lifespan and cost per year
basic Tile Roof Cost Calculator
Clay ($10–18/sqft), concrete ($8–14), and synthetic ($7–12) tile costs with regional multipliers for FL, AZ, and CA — includes underlayment upgrade and weight check
basic Roof Home Value Calculator
Calculate home value impact of new roof — new roof adds ~68% of cost to value (Remodeling Magazine). ROI, value increase, and net out-of-pocket after value gain for home sellers
basic Roof Material Cost Per Year Calculator
Annualized cost: installed_cost / lifespan + annual maintenance. Monthly equivalent. Compare 8 materials side-by-side with reference lifespan and cost notes.
basic Roof Tear-Off Cost Calculator
Estimate cost to remove old roofing including labor and disposal fees
basic Roofing Labor Cost Calculator
Estimate labor costs based on roof size, complexity, and regional rates
basic Roof Material Comparison
Compare costs and lifespan of different roofing materials side by side
basic Roofing Dumpster Size Calculator
Calculate dumpster size and weight for roof tear-off debris — 10, 20, or 30 yard recommendations
basic Roof Permit Cost Calculator
Estimate building permit costs for your roofing project by state and project value
basic Roofing Bid Calculator
Generate a professional roofing bid with material, labor, overhead, and profit margin — for contractors
intermediate Roof Snow Removal Cost Calculator
Estimate snow removal cost at $0.20-0.50/sqft based on roof area, snow depth, and accessibility
basic Soffit & Fascia Cost Calculator
Estimate combined soffit and fascia replacement cost by material type and linear footage — $7.50-24/ft installed
basic Flat-to-Pitched Roof Conversion Calculator
Calculate costs and materials to convert a flat roof to pitched — new framing, sheathing, underlayment, and roofing
intermediate Dormer Cost Calculator
Estimate dormer installation cost by type: shed $15K–$25K, gable $20K–$30K, hip $25K–$40K — includes framing, roofing, window, and optional interior finish
basic Roof Cost by Region Calculator
Adjust roofing cost by US region — Northeast ×1.15, Southeast ×0.90, Midwest ×0.95, West Coast ×1.20, Mountain ×1.05 — with pitch complexity factor for total project estimate
basic ACV Roof Calculator (Actual Cash Value)
Insurance ACV = RCV × (1 − age/lifespan). Calculate recoverable depreciation, net claim after deductible, and out-of-pocket cost for roof insurance claims
basic Slate Roof Cost Calculator
Natural slate ($15–30/sqft, 75–200 yr) vs synthetic slate ($9–14/sqft, 30–50 yr) — weight capacity check, cost per year, and 50-year comparison against asphalt shingles
basic Corrugated Metal Roof Cost Calculator
Corrugated ($3–6/sqft), R-panel ($4–7), and 5V Crimp ($5–8) metal panel costs including fasteners and trim — the most budget-friendly metal roofing option
basic Roof Replacement Timeline Calculator
Calculate total project days: tear-off (1 day/15 sq) + installation by material (shingles 2–3 days, metal 3–5, tile 5–7, slate 7–10) + weather buffer and permit inspection
basic Roofing Contingency Budget Calculator
Calculate recommended contingency percentage and dollar amount based on roof age, complexity, deck condition, and climate risk
basic Roofing Profit Margin Calculator
Calculate sell price, markup, and net profit for roofing contractors from material, labor, overhead, and target margin inputs
basic Roof Hurricane Clip Cost Calculator
Total clips = rafters × connections (2 standard). Material cost $1.50–$5/clip by type, plus labor. Total installed cost and cost per rafter breakdown.
basic Roof Material Delivery Pallet Calculator
Pallets by material: shingles 42 bundles/pallet, concrete tile 110/pallet, metal panels 20/bundle. Staging area = pallets × 24 sqft. Total delivery weight in tons.
basic Skylight Replacement Cost Calculator
Replace existing skylight: removal + new unit + flashing kit + install labor. By size (22×22, 30×46, 44×46) and type (fixed, vented, solar).
basic Roof Financing Calculator
Calculate monthly payments for roof financing and loan options
basic Roofing Labor Hours Calculator
Estimate total man-hours for a roofing job by size, pitch, material, tear-off layers, and crew productivity
intermediate Roof Scaffolding Cost Calculator
Estimate scaffolding rental and installation cost based on building height, perimeter, and rental duration
basic Roof Material Delivery Weight Calculator
Total delivery weight: shingles, underlayment, nails, flashing, trim, and adhesive. Weight by item and total in lbs and tons for crane, conveyor, or fork truck planning.
basic Roof Skylight Shade Cost Calculator
Interior skylight shades: manual $200–$400, motorized $500–$1,000, premium with solar sensor $1,000–$1,500 each. Total cost, annual energy savings, and payback period.
basic Roof ROI Calculator
Calculate return on investment for roof replacement or upgrade
intermediate Roof Insurance Claim Calculator
Estimate your roof insurance claim value and out-of-pocket costs
intermediate Roofing Material Delivery Calculator
Calculate pallet counts, truck loads, crane hours, and staging area for roofing material delivery
intermediate Roof Insulation Calculator
Calculate insulation thickness and R-value needed for your climate zone
intermediate Attic Insulation Calculator
Calculate how much insulation to add to your attic for optimal efficiency
basic Roof Skylight Energy Calculator
U-factor annual heat loss: Q = U × A × 24 × HDD. Annual energy cost. SHGC solar gain estimate and net energy impact. ENERGY STAR compliance check for U-factor and SHGC.
intermediate R-Value Calculator
Calculate total R-value for multi-layer roof and attic assemblies
intermediate Metal Roof Color & Heat Calculator
Compare surface temperatures and cooling cost impact across metal roof colors using Solar Reflectance Index (SRI)
basic Ice Melt Cable Calculator
Calculate heat cable length for roof edges — zigzag pattern on eave, gutter run, downspout length, wattage, and circuit sizing
intermediate Roof Dead Load Calculator
Calculate total permanent dead load (psf) from each roof assembly layer — sheathing, covering, underlayment, insulation, and framing
intermediate Roof Ice Dam Prevention Calculator
Multi-factor ice dam risk score from R-value, ventilation, ice shield, and climate zone — risk level and prevention cost estimate
intermediate Roof Attic Bypass Sealing Cost Calculator
Total bypasses × $5–$15 each — foam cans, sealing time, total cost, and estimated annual energy savings from air sealing top plate holes, recessed lights, and penetrations.
basic Roof Energy Savings Calculator
Calculate annual energy savings from roof insulation and material upgrades
intermediate Ice Dam Risk Calculator
Assess your ice dam risk level based on insulation R-value, ventilation, pitch, and climate zone
basic Skylight Natural Light Calculator
Calculate optimal skylight size for natural daylighting — the 3-5% floor area rule with energy savings estimate
basic Cathedral Ceiling Insulation Calculator
Calculate insulation for vaulted ceilings — spray foam, rigid board, or batts with ventilation channel requirements
intermediate Tapered Insulation Calculator
Calculate flat roof tapered insulation — slope direction, board counts, average R-value, and adhesive for proper drainage
advanced Roof Energy Code Calculator
IECC 2024 minimum R-value and maximum U-factor by climate zone 1–8 for vented attics and cathedral roofs — compliance check with additional insulation needed
basic Roof Cathedral Vent Channel Calculator
IRC R806.3 compliance: min 1" vent channel. Baffle count = rafter bays. Total baffle LF. R-value loss from channel (~0.9 per inch) and net achievable insulation R-value.
intermediate Roof Heat Loss Calculator
Calculate heat loss through your roof and potential energy savings
advanced Cool Roof Calculator
Calculate energy savings from reflective cool roof coatings
intermediate Spray Foam Roof Calculator
Calculate spray foam insulation coverage and cost for roof applications
intermediate Roof Condensation & Dew Point Calculator
Determine if your roof assembly is at risk of condensation based on temperature gradient and humidity
advanced Roof Thermal Bridging Calculator
Calculate effective R-value reduction from steel purlins or wood rafters — typical 30-50% R-value loss
advanced Metal Roof Thermal Expansion Calculator
Calculate expansion and contraction in metal panels by material type (steel, aluminum, copper, zinc), panel length, and temperature range
intermediate Roof-to-Floor Ratio Calculator
Calculate the ratio of roof area to floor area — key metric for energy modeling, code compliance, and building efficiency
basic Wind-Driven Rain Calculator
Calculate rain penetration risk by wind speed, roof pitch, and overhang — determines underlayment and flashing upgrades
intermediate Roof Moisture Barrier Calculator
Select vapor retarder class (I/II/III) by climate zone per IBC Table 1405.3.2 — calculate area with overlap allowance
intermediate Radiant Barrier Calculator
Calculate energy savings from installing a radiant barrier in your attic
intermediate Gutter Size Calculator
Calculate the correct gutter size based on roof area and rainfall intensity
intermediate Downspout Calculator
Calculate number and size of downspouts needed for your gutter system
basic Gutter Cost Calculator
Estimate gutter installation costs by material type and linear footage
basic Gutter Extension Calculator
Calculate downspout extension length to direct water 6ft+ from foundation — splash blocks vs buried pipe vs roll-up extensions
basic Flat Roof Drain Sizing Calculator
Size internal roof drains by IPC code — Q = area × rainfall / 96.23 GPM, primary + overflow drain count
advanced Gutter Run Length Calculator
Calculate maximum gutter run between downspouts by gutter size, rainfall intensity, and drainage area — plus expansion joint count
basic Roof Gutter Pitch per Foot Calculator
Standard gutter pitch 1/16" per foot toward downspout. Total drop, high-end height, and level-to-drop marking schedule for single or center-downspout gutter runs.
basic Roof Storm Water Harvesting Calculator
Capturable rainwater: catchment_area × rainfall × 0.85 efficiency × 0.623 gal/sqft/in. Annual gallons, tank size for X days storage.
intermediate Rainwater Collection Calculator
Calculate rainwater harvest potential from your roof area
basic Downspout Placement Calculator
Calculate optimal number and position of downspouts based on roof area, rainfall intensity, and gutter capacity
basic Gutter Hanger Spacing Calculator
Calculate number of hangers and optimal spacing — 18 inches for snow regions, 36 inches for mild climates
basic Leaf Guard Linear Feet Calculator
Estimate total linear feet of gutter guard needed based on roof perimeter and gutter layout with cost estimate
basic Rain Chain Calculator
Calculate rain chain length, cup count, flow capacity, and number of chains needed based on roof area and rainfall
basic Stormwater Runoff Calculator
Rational method Q = C×i×A: runoff coefficient by material (metal 0.95, shingle 0.90, tile 0.85, green roof 0.35) × rainfall intensity × area in acres — output in CFS and GPM
intermediate Dry Well Sizing Calculator
Size a dry well using volume = roof area × rainfall × 0.623 × runoff coefficient / 7.48 — outputs required cubic feet, well depth, gravel fill, and overflow pipe recommendation
intermediate Rain Garden Sizing Calculator
Size a rain garden at 20–30% of contributing roof area — soil-adjusted depth factor, ponding depth, garden dimensions (2:1 ratio), soil amendment depth, and plant count
basic Roof Parapet Scupper Calculator
Scupper sizing through parapet walls: width = sqrt(Q/3.0), height = width × 0.67. Emergency overflow scuppers = primary × 1.5. IBC 1503.4 compliance.
intermediate Hip Roof Water Shed Calculator
4-direction drainage for hip roofs. Each face catchment percentage of total. GPM per face and gutter sizing vs single perimeter system.
intermediate Gutter Slope Calculator
Calculate the correct slope/grade for gutter installation
basic Roof Drainage Calculator
Calculate drainage requirements for flat and low-slope commercial roofs
intermediate Gutter Guard Calculator
Calculate gutter guard materials needed and compare costs by type
basic Scupper Drain Sizing Calculator
Calculate required scupper width and height based on roof drainage area and rainfall rate per IPC code
intermediate Box Gutter Calculator
Calculate internal box gutter width, depth, and outlet sizing based on roof catchment area and SMACNA rainfall standards
advanced Hidden Gutter Calculator
Calculate concealed/built-in gutter dimensions, liner area, and outlet sizing for architectural applications
advanced French Drain Calculator
Calculate french drain dimensions for foundation drainage from roof runoff
intermediate Attic Ventilation Calculator
Calculate Net Free Area (NFA) needed for balanced attic ventilation
intermediate Ridge Vent Calculator
Calculate ridge vent length needed for proper attic exhaust
basic Soffit Vent Calculator
Calculate soffit vent quantity for balanced intake ventilation
basic Roof Vent Calculator
Calculate total ventilation requirements using the 1:150 or 1:300 rule
basic Solar Attic Fan Calculator
Calculate CFM needed (1 CFM per 150 sqft), recommended fan wattage (20W/800CFM, 30W/1200CFM, 40W/1600CFM), number of fans, and payback period vs electric attic fan
basic Roof Ridge Vent NFA Calculator
Calculate ridge vent NFA provided vs required, intake shortfall, and whether soffit venting is balanced — uses 18 sq.in/LF standard
intermediate Roof Ventilation NFA Calculator
Calculate total NFA needed by 1:150 or 1:300 rule, existing ridge and soffit NFA, shortfall, and system balance status
intermediate Roof Ventilation Ratio Check Calculator
Input existing vents by type and count — calculate total NFA, compare to 1:150 or 1:300 rule, and get pass/fail with shortfall and additional vents needed
intermediate Roof Continuous Ridge Vent Calculator
Calculate effective vent length after setbacks, 4-ft section count, total NFA provided vs required, and end plug count for continuous ridge vent systems
basic Roof Gable Vent Free Area Calculator
NFA for rectangular, round, or triangular gable vents with screen and louver reduction factors per IRC Table R806.2. Multi-vent total NFA vs required NFA compliance check.
intermediate Roof Ventilation Short Circuit Calculator
Diagnoses ridge vent + gable vent conflicts and insufficient vertical intake-exhaust separation. Identifies short-circuit risk and recommends corrective vent placement.
intermediate Roof Ventilation Air Temperature Calculator
Attic temperature with vs without ventilation: balanced venting = ambient +15°F; unvented = ambient +50°F. Required NFA by IRC ratio. Shingle longevity benefit from cooling.
basic Gable Vent vs Ridge Vent Calculator
Gable-only vs ridge+soffit NFA delivered and balance — short-circuit risk warning, IRC compliance check, intake vs exhaust balance, and additional vents needed.
intermediate Roof Ventilation Balance Checker
Check if your existing intake and exhaust vents are properly balanced — diagnostic tool with fix recommendations
basic Attic Fan Sizing Calculator
Calculate required CFM for powered attic fans — attic sqft × 0.7 with adjustments for dark roofs and steep pitch
basic Roof Exhaust Fan Calculator
Calculate CFM requirements for roof-mounted exhaust fans based on building volume, use type, and required air changes per hour
intermediate Roof Ice Barrier Width Calculator
IRC R905.1.2: ice barrier extends eave overhang + 24" past interior wall. Eave and valley coverage areas, total rolls needed (67 sq ft/roll), and code compliance note.
basic Gable Vent Calculator
Calculate gable vent size needed for cross-ventilation
basic Turbine Vent Calculator
Calculate number of turbine (whirlybird) vents needed for your attic
basic Power Vent Calculator
Calculate powered attic ventilator (PAV) CFM requirements
intermediate Roof Materials Checklist
Generate a complete shopping list — enter area, pitch, material type and get every item: bundles, nails, starter, underlayment, trim
basic Drip Edge Calculator
Calculate linear feet of drip edge needed for roof eaves and rakes
basic Ridge Cap Calculator
Calculate ridge cap shingles or metal ridge cap needed
basic Roof Cricket Calculator
Calculate cricket (saddle) dimensions for chimney diverters per IRC code — ridge height, valley angles, and material quantities
intermediate Chimney Cap Size Calculator
Determine correct chimney cap size from flue dimensions, accounting for multi-flue setups and spark arrestor mesh area
basic Metal Roof Trim Calculator
Calculate all trim pieces for metal roof — ridge cap, gable, eave, sidewall, endwall, transition, and corner pieces
intermediate Roof Fascia Length Calculator
Total fascia LF = eave + rake perimeter. Board count by 12/16/20ft length with 10% waste. Butt joint count, paint/wrap area, and material-specific installation notes.
basic Roof Perimeter Edge Flashing Calculator
Perimeter edge metal: gravel stop, drip edge, termination bar, or parapet coping. Total LF with 10% overlap, pieces at 10 ft stock, sealant tubes, and continuous cleat LF.
basic Roof Fascia Board Replacement Calculator
Rotted fascia boards replacement cost: LF damaged × $2–9/ft material (pine/cedar/PVC/aluminum) + labor + gutter removal fee — total installed cost per LF.
basic Roof Fascia Vinyl vs Aluminum vs Wood Calculator
3-way fascia comparison: total installed cost for vinyl PVC, aluminum, and wood by linear feet — lifespan (vinyl 30+, aluminum 40+, wood 10–15 yr), maintenance notes, and recommendation.
basic Flashing Calculator
Calculate step flashing, valley flashing, and chimney flashing materials
intermediate Soffit Calculator
Calculate soffit panels and materials for roof overhangs
basic Fascia Calculator
Calculate fascia board materials for roof edge finishing
basic Step Flashing Calculator
Calculate step flashing piece count, overlap, and material for wall-to-roof intersections
basic Roof Pipe Boot Sizing Calculator
Select correct pipe boot size by pipe outside diameter and roof pitch — prevent leaks from incorrect sizing
basic Standing Seam Panel Calculator
Calculate panel count and lengths for standing seam metal roofs — 12" to 18" coverage widths
intermediate Rake Board & Trim Calculator
Calculate linear feet of rake trim needed using pitch multiplier and gable dimensions with overlap allowance
basic Fascia Board Size Calculator
Calculate fascia board width and thickness based on rafter tail cut angle, roof pitch, and drip edge requirements
basic Skylight Flashing Kit Calculator
Select correct flashing kit by skylight size and roof pitch — step flashing pieces, counter flashing, and sill pan components
basic Roof Flue Pipe Calculator
Calculate flue pipe height (10-3-2 rule), diameter by BTU, flashing collar size, and storm collar for chimney/stove installations
intermediate Metal Roof Closure Strip Calculator
Calculate foam closure strips for eave, ridge, and transition points on metal roofs — total strips and cost
basic Metal Roof Ridge Vent Calculator
Calculate ridge vent length, NFA, and matching soffit intake specifically for metal roof systems and profiles
intermediate Verge Tile Calculator
Calculate verge tiles, clips, and mortar for gable rake edges — tiles = rake length / tile width with 0.5 kg mortar per tile
basic Hip End Tile Calculator
Calculate hip bonnet tiles for hip roof corners — tile count from hip length and gauge, with 10% cut waste allowance
intermediate Dry Ridge System Calculator
Calculate dry-fix ridge roll length, unions, end caps, and fixing pins for mechanical ridge installation
basic Soffit Return Calculator
Calculate soffit return angle, depth, panel area, and J-channel length based on roof pitch and overhang dimensions
basic Roof Rake Overhang Calculator
Calculate fly rafter length, lookout count, sheathing extension, and lumber quantities for gable rake overhang
intermediate Roof Gable Stud Calculator
Calculate gable wall stud count, tapering heights, total linear feet, and board feet for gable end framing
intermediate Roof Step Flashing Count Calculator
Calculate step flashing piece count based on wall height and shingle exposure — material options aluminum, galvanized, lead, copper
basic Metal Roof Eave Trim Calculator
Calculate eave trim pieces, end dams, and material cost for metal roof eave/starter strips — all common material grades
basic Metal Roof Z-Flashing Calculator
Calculate Z-bar pieces, sealant tubes, fastener count, and material cost for wall-to-roof transitions on metal panel systems
basic Roof Skylight Curb Calculator
Calculate curb perimeter, framing lumber, flashing apron length, and outer frame dimensions for curb-mounted skylights — minimum 4" height per code
basic Metal Roof Gable Trim Calculator
Calculate gable/rake trim pieces, J-channel backing, fastener count, and material cost for metal roof gable ends — standard 10.5 ft pieces
basic Roof Drip Edge Size Calculator
Size drip edge by pitch and profile: Type C (L-shape) for shingles, Type D (T-shape) for steep/tile, Type F (hemmed) for metal. Hem depth, total LF, and pieces needed.
basic Roof Fascia Wrap Calculator
Aluminum coil stock width = fascia width + wrap overhang. Total coil LF, rolls needed at 50ft, pieces per roll, and coil width fit check for brake bending.
basic Roof Dormer Cheek Wall Calculator
Cheek wall trapezoidal area per dormer from depth and front/rear heights. Total siding sqft for all dormers, and flashing LF at roof-to-cheek wall junction.
intermediate Roof Hatch Curb Height Calculator
Minimum curb height: 4" for slope < 1:12, 8" for ≥ 1:12 (NRCA/IBC). Curb width = hatch + 2" clearance. Flashing perimeter with horizontal leg dimensions.
intermediate Edge Detail Flashing Calculator
Combined edge details: drip edge + ice barrier + starter strip. Sequential IRC install order. Total edge LF and material quantities.
basic Starter Strip Calculator
Calculate starter strip shingles needed for roof edges
basic Valley Calculator
Calculate valley length, flashing, and materials for roof valleys
intermediate Chimney Flashing Calculator
Calculate flashing materials needed around chimneys and roof penetrations
intermediate Skylight Calculator
Calculate skylight sizing, framing, and flashing requirements
intermediate Parapet Wall Cap Calculator
Estimate coping pieces, linear feet, and cost for parapet wall cap installations on flat commercial roofs
basic Soffit Lighting Calculator
Calculate number of recessed soffit lights, spacing, wattage, and wiring runs for exterior soffit illumination
basic Rain Diverter Calculator
Calculate diverter size and placement for redirecting water above doorways and roof-wall junctions where gutters cannot be installed
basic Metal Roof Transition Calculator
Calculate transition trim at ridge-to-wall, pitch changes, and material changes — Z-bar, J-channel, or custom bent flashing
intermediate Roof Gravel Stop Calculator
Calculate linear feet and pieces of gravel stop edge metal for flat roofs — height, corners, and cost estimation
basic Eave Return Calculator
Calculate dimensions, sheathing cuts, and angles for decorative eave returns — Colonial/Greek Revival style detail
advanced Roof Soaker Flashing Calculator
Calculate soaker flashing pieces for chimney sides — count from chimney width and tile gauge, lead code 3 weight
intermediate Roof Counter Batten Calculator
Calculate counter battens (1×2 in) total linear footage and nail count — one counter batten per rafter at rafter spacing
basic Roof Sarking Board Calculator
Calculate sarking board count and linear footage from roof area — coverage per board, nails, and material cost
basic Crown Molding Soffit Calculator
Decorative crown molding at soffit: corner blocks + LF. Inside/outside corners. PVC, MDF, wood, or polyurethane material options with cost.
basic Roof Sealant Calculator
Calculate roof sealant and caulk needed for seams and penetrations
basic Metal Roof Oil Canning Risk Calculator
Calculate oil canning risk factors and prevention strategies based on panel width, gauge, rib height, and substrate flatness
intermediate Roof Water Damage Repair Calculator
Estimate repair costs for water-damaged decking, rafters, insulation, and drywall based on affected area and damage severity
intermediate Roof Repair vs Replace Calculator
Decision tool: replace if repair cost exceeds 30% of replacement cost OR age exceeds 80% of lifespan OR condition is severely degraded — with cost-per-remaining-year analysis
basic Roof Contractor Score Calculator
Score contractors 0–100: licensed (+20), insured (+20), workmanship warranty (+15), references (+10), written estimate (+10), local business (+10), BBB (+5), manufacturer certified (+10). Pass threshold: 60
basic Roof Asphalt Shingle Lifespan Estimator
Factor-based lifespan specific to asphalt shingles: base lifespan adjusted for ventilation, climate, shingle color, and maintenance quality. Estimated replacement year.
intermediate Roof Lifespan Calculator
Estimate remaining roof life based on material, age, and conditions
basic Roof Leak Repair Cost Calculator
Estimate repair costs for common roof leak scenarios
basic Roof Cleaning Cost Calculator
Estimate soft wash or pressure wash roof cleaning costs — cleaner gallons, labor hours, and total cost
basic Roof Hail Damage Calculator
Assess hail damage severity by hail size and roof material — estimated repair cost and insurance claim guidance
basic Roof Sag Repair Cost Calculator
Estimate cost and materials to fix a sagging roof — sistering rafters, adding support beams, or jacking
intermediate Emergency Roof Tarp Calculator
Calculate emergency tarp size (1.5× damage area), number of tarps from standard sizes, sandbags, and furring strip attachment
basic Roof Material Lifespan Calculator
Compare 13 roofing materials by lifespan — asphalt 15–30 yr, metal 40–70 yr, tile 50–100 yr, slate 75–200 yr, TPO/EPDM 20–25 yr — with install cost, cost/year, and 50-year total cost
basic Roof Warranty Comparison Calculator
Compare 5 warranty tiers: standard (25yr material), extended (30yr), system/certified (40yr material+labor), platinum (50yr), and lifetime — coverage type, transfer fee, and annual warranty cost
basic Roof Flashing Cost Calculator
Budget all flashing: chimney ($200–500 each), pipe boots ($10–30 each), step flashing ($5–10/lf), valley ($8–15/lf), drip edge ($2–4/lf) — low and high total flashing estimate
basic Roof Shingle Replacement Area Calculator
Partial shingle replacement: bundles for damaged area + 5% extra. Color match risk assessment by roof age (>3 years = moderate risk). Breakeven vs full replacement guidance.
basic Storm Damage Assessment Calculator
Score visible damage: missing shingles, dents, granule loss, leaks. Damage score 0–100. Insurance claim threshold guidance (25% damage = full replacement).
basic Roof Storm Cleanup Cost Calculator
Post-storm emergency costs: debris removal $300–$800, tarping $500–$1,500, temporary patches $200–$600. Total emergency response estimate.
basic Roof Inspection Calculator
Score your roof condition with an interactive inspection checklist
basic Shingle Replacement Calculator
Calculate materials needed for partial shingle repair or replacement
basic Roof Warranty Value Calculator
Calculate remaining warranty coverage, prorated value, and transfer eligibility for your roof
basic Asbestos Roof Removal Cost Calculator
Calculate asbestos roof removal cost by square footage with disposal fees and state-specific abatement requirements
basic Roof Maintenance Cost Calculator
Estimate annual maintenance costs based on roof type and age
basic Roof Depreciation Calculator
Calculate current roof value accounting for age and wear
intermediate Roof Moss Treatment Calculator
Calculate moss treatment solution and zinc strip needs for your roof
basic Solar Roof Calculator
Calculate how many solar panels fit on your roof and estimated energy production
intermediate Solar-Ready Roof Calculator
Check if your roof can support solar — structural capacity, available area minus setbacks, conduit paths, and kWh potential
intermediate Solar Panel Area Calculator
Calculate usable roof area for solar panel installation
basic Solar Roof Savings Calculator
Calculate long-term energy savings and payback period for solar roofing
intermediate Green Roof Calculator
Calculate materials, weight, and cost for a vegetated green roof
advanced Solar Shingle Calculator
Calculate solar shingles needed vs traditional panels for your roof
intermediate Solar Panel Weight Calculator
Calculate total weight of solar panel system for structural assessment
basic Rain & Sun Harvest Calculator
Calculate combined rainwater and solar energy harvest from your roof
intermediate Ground-Level Roof Measurement Calculator
Estimate roof area from ground measurements — no ladder needed. Uses building footprint, pitch factor, and overhang
basic Lean-To Roof Calculator
Calculate area and materials for an attached single-slope structure — patio cover, carport, or addition with ledger board and post heights
basic Carport Roof Calculator
Calculate roof area, materials, and post layout for a freestanding or attached carport — single or double car
basic Attic Conversion Calculator
Calculate usable floor area, structural reinforcement, insulation, drywall, and total cost for converting attic to living space
intermediate Roof Material Palette Calculator
Color palette selector: shingle colors × trim × gutter combinations. Complementary vs matching vs neutral schemes. Climate region recommendations for cool roofs, dark absorbers, and coastal materials.
basic Metal Roof Gauge Selection Calculator
Select the right metal gauge (22, 24, 26, 29) based on roof span, wind zone, snow load, and panel profile
intermediate Attic Floor Area Calculator
Calculate usable attic floor area based on roof geometry, pitch, and minimum 7-foot headroom clearance per building code
basic Roof Ladder Height Calculator
Calculate required ladder length to safely reach roof edge per OSHA rules — 3ft above roof line plus proper 75° angle
basic Mobile Home Roof Calculator
Calculate roof-over materials for manufactured homes — standard widths 14ft and 16ft, lightweight requirements
basic Metal Building Roof Calculator
Calculate panels, fasteners, and trim for pre-engineered metal building roofs — standard widths 24ft to 60ft
intermediate Awning Roof Calculator
Calculate awning area, material quantity, and cost — fabric, metal, or polycarbonate options with frame weight estimation
basic Roofing Season Planner
Find the optimal roofing season by climate zone — best months, shingle adhesive temperature needs, rain days, and cold surcharges
basic Pergola Shade Calculator
Calculate shadow coverage by rafter spacing, orientation, and latitude — optimize shade % at noon and 3pm throughout the year
intermediate Pole Barn Roof Calculator
Calculate metal panels, trusses, and purlins for post-frame pole barn roofs — panel count and purlin LF at 24–48 in OC
intermediate Roof Ridge Length Calculator
Calculate total ridge length by roof type (gable, hip, cross-gable, T-shape), ridge cap pieces, and ridge vent length
basic Roof Wind Debris Impact Resistance Calculator
UL 2218 Class 1–4 testing: 2" steel ball impact. Required class by wind zone. Insurance discount eligibility for Class 4 rated products.
intermediate Cool Roof Tax Credit Calculator
Energy Star / IRS 25C tax credits: $500 max federal. SRI ≥ 25 (low-slope) or ≥ 16 (steep). Form 5695 reference and state credit notes.
intermediate Commercial Roof Calculator
Calculate materials and costs for flat commercial roofing projects
advanced Garage Roof Calculator
Calculate materials for detached garage and carport roofs
basic Porch Roof Calculator
Calculate materials and dimensions for porch and patio roof covers
basic Rooftop Garden Weight Calculator
Calculate total dead and live load of a rooftop garden (soil, planters, water saturation, pavers, people) to verify structural adequacy
intermediate Greenhouse Roof Calculator
Calculate glass or polycarbonate panel quantity, optimal roof angle for light, and ventilation area for a greenhouse
intermediate Pool Enclosure Roof Calculator
Calculate screen panel area, aluminum frame, and roof material for a pool cage or enclosure — popular in FL and Sun Belt
intermediate RV Cover Roof Calculator
Calculate roof area and materials for an RV carport or cover — standard sizes 12×35 to 14×45 with height clearance
basic Canopy Roof Calculator
Calculate fabric or metal canopy area, frame dimensions, and anchoring for outdoor shade structures and walkways
basic Roof Ballast Calculator
Calculate ballast weight for flat roof membrane — 10-25 psf by wind zone, total tons, river rock vs pavers vs concrete blocks
intermediate Skylight Tunnel (Sun Tube) Calculator
Size solar tube diameter (10/14/21 in) by room sqft and estimate peak lumens accounting for tube length and bends
basic Roof Attic Storage Load Calculator
Attic storage live load: 20 psf limited, 40 psf full/habitable (IRC R301.5). Max load per joist bay. Estimated joist capacity by size and span with adequacy pass/fail.
intermediate Roof Fall Arrest Anchor Calculator
Anchor point engineering: 5,000 lb tested. Spacing for tied-off worker = max swing radius. Quantity by roof perimeter and worker count.
intermediate Walkable Roof Area Calculator
Walkable roof area for inspection: pitch ≤ 7:12 walkable without gear. Total accessible vs equipment-required area by pitch and material.
basic Barn Roof Calculator
Calculate dimensions and materials for agricultural barn roofs
intermediate Pergola Roof Calculator
Calculate roofing materials for pergola and pavilion covers
basic Tar & Gravel Roof Calculator
Calculate tar gallons, gravel quantity, and felt plies for built-up roofing (BUR) on flat commercial roofs
intermediate Roof Fall Protection Calculator
Calculate anchor point count and placement per OSHA requirements based on roof area, slope, and crew size
intermediate HVAC Roof Curb Calculator
Size curb adapter dimensions — height, pitch compensation, and opening size for rooftop HVAC units and equipment
intermediate Roof Access Hatch Size Calculator
Determine minimum hatch dimensions per IBC code based on access method, equipment requirements, and occupancy type
basic Skylight Well Depth Calculator
Calculate light well dimensions, flare angles, and drywall area for skylights installed in cathedral and vaulted ceilings
intermediate Octagonal Roof Calculator
Calculate 8-sided roof area with eight hip rafters and triangular panels for gazebos, bandstands, and architectural towers
intermediate Clerestory Roof Calculator
Calculate raised central roof section with vertical windows between two roof planes — wall area, glazing, and structural framing
advanced Rooftop HVAC Platform Calculator
Calculate equipment platform dimensions, structural reinforcement, and weight distribution for rooftop HVAC units
intermediate Chicken Coop Roof Calculator
Calculate roofing materials for a chicken coop — small shed or gable roof with ventilation and predator-proofing
basic Playhouse Roof Calculator
Calculate roofing materials for a kids playhouse — small gable or hip roof with kid-safe lightweight materials
basic Cupola Sizing Calculator
Calculate proper cupola size proportional to ridge length — 1-1.5" per foot of ridge, standard sizes, and ventilation NFA if functional
basic Roof Access Stairs Calculator
Calculate stair dimensions, riser/tread count, landing requirements, and stringer length for permanent roof access per IBC
intermediate Roof Parapet Height Calculator
Calculate minimum parapet wall height per IBC 705.11 by fire separation distance — plus cap flashing and coping requirements
intermediate Cupola Ventilation Calculator
Calculate Net Free Area per cupola and number of cupolas needed — NFA = opening height × width × 4 sides × 50% louver factor
intermediate Roof Parapet Flashing Calculator
Calculate base flashing area, cap flashing pieces, through-wall flashing sections, total material cost, and sealant tubes for parapet wall flashing
intermediate A-Frame Roof Calculator
Calculate dimensions and materials for steep A-frame cabin roofs
intermediate Rooftop Deck Calculator
Calculate load requirements and materials for a rooftop deck or terrace
advanced Roof Walkway Pad Calculator
Calculate quantity and layout of walkway pads for flat roofs to protect membrane and provide safe access to HVAC units and drains
basic Church Steeple Calculator
Calculate surface area of a church steeple or spire — octagonal or square base tapering to a point or cross
advanced Cupola Calculator
Calculate cupola size, ventilation, and placement for your roof
intermediate