Roof Repair Cost Calculator

How roof repair pricing actually works

Roofers price a repair from five drivers, in roughly this order of importance: what is broken (a shingle patch is a two-hour job; rotted decking means tearing the roof open), what the roof is made of (tile and slate are slower and riskier to walk on than asphalt), how steep it is (steep roofs need safety rigging and move slower), how high and hard to reach (multi-story access, landscaping in the way), and local labor rates (which vary 30–50% between US markets).

This calculator models each driver as a multiplier on a base range per repair type. The base ranges come from 2026 contractor-published data; the multipliers come from published per-square-foot repair rates and reported labor premiums. Every assumption is labeled in the methodology section below — nothing is a black box.

Typical cost by repair type

Material multipliers (repair $/sq ft vs asphalt)

Access and market multipliers

Worked examples (recomputed by the engine)

Repair or replace? The 30% rule

Roofing pros use a simple gate: if the repair quote exceeds 30% of what a full replacement would cost, replace instead — you are spending a third of the price on a patch that buys only a few more years. The second tab applies this test to your numbers, then adjusts one step for roof age: over 20 years leans replace, under 10 leans repair.

Replacement reference ($/sq ft installed)

Pitch factors sit inside the published 1.05–1.41 roof-area multiplier range for replacement work. Sanity check: a 2,000 sq ft medium-pitch asphalt roof → 2,000 × 1.20 × $7 = $16,800, squarely in the published $11,000–$17,000 national band for that roof.

Insurance and storm damage

Homeowners insurance typically covers sudden damage — hail, wind, fallen trees — but not wear and aging. Document damage with photos before any repair, get a written roofer estimate, and file within about 30 days of the event. Most policies carry a $1,000–$2,500 deductible; on a $5,000 hail repair your out-of-pocket can be just the deductible. If your insurer pays actual cash value (depreciated), our actual cash value calculator shows how depreciation shrinks the payout.

Need the pitch of your roof first? The roof pitch calculator converts rise/run, angle and X:12 formats.

Methodology and sources

Base repair ranges are composites of contractor-published 2026 data: AllBetter (national 2026 repair guide), Angi (2026 repair cost data), and a Florida roofing contractor's published repair calculator (Pembroke Pines). Material multipliers are ratios of published per-square-foot repair rates to the asphalt baseline. Pitch, stories and region multipliers come from published labor premiums (steep-roof 20–40%, two-story 20–30%, regional labor spreads 30–50%). Three inputs are labeled model assumptions in the UI: the 1.25× emergency surcharge, the 0.85/1.00/1.60 extent scale, and the 1.40× three-story factor. Full per-number provenance is in the tool's published sources file.