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23 calculators

Repair & Maintenance Calculators

Estimate repair costs, plan maintenance schedules, and assess roof condition. All tools are free — no registration or download required.

Roof Water Damage Repair Calculator

Estimate repair costs for water-damaged decking, rafters, insulation, and drywall based on affected area and damage severity

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

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

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.

Roof Lifespan Calculator

Estimate remaining roof life based on material, age, and conditions

Roof Leak Repair Cost Calculator

Estimate repair costs for common roof leak scenarios

Roof Cleaning Cost Calculator

Estimate soft wash or pressure wash roof cleaning costs — cleaner gallons, labor hours, and total cost

Roof Hail Damage Calculator

Assess hail damage severity by hail size and roof material — estimated repair cost and insurance claim guidance

Roof Sag Repair Cost Calculator

Estimate cost and materials to fix a sagging roof — sistering rafters, adding support beams, or jacking

Emergency Roof Tarp Calculator

Calculate emergency tarp size (1.5× damage area), number of tarps from standard sizes, sandbags, and furring strip attachment

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

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

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

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.

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).

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.

Roof Inspection Calculator

Score your roof condition with an interactive inspection checklist

Shingle Replacement Calculator

Calculate materials needed for partial shingle repair or replacement

Roof Warranty Value Calculator

Calculate remaining warranty coverage, prorated value, and transfer eligibility for your roof

Asbestos Roof Removal Cost Calculator

Calculate asbestos roof removal cost by square footage with disposal fees and state-specific abatement requirements

Roof Maintenance Cost Calculator

Estimate annual maintenance costs based on roof type and age

Roof Depreciation Calculator

Calculate current roof value accounting for age and wear

Roof Moss Treatment Calculator

Calculate moss treatment solution and zinc strip needs for your roof

About Repair & Maintenance

This category contains 23 specialized calculators covering all aspects of repair & maintenance. Whether you are a homeowner planning a project or a roofing contractor estimating materials, these tools give you accurate results based on industry-standard formulas.

Each calculator includes step-by-step guidance, example calculations, and explanations of the underlying formulas so you understand exactly how your numbers are derived. Results are suitable for budgeting and planning — always consult a licensed roofing professional before starting structural work.

How to Use These Calculators

Start by entering your roof's basic dimensions. Most calculators need length, width, and pitch at minimum. Results update instantly as you type. Use the unit toggle to switch between imperial (feet, inches) and metric (meters) measurements. All calculators are mobile-friendly and work on any device.

Other Calculator Categories

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