💧 Roof Leak Repair Cost Estimator

Estimate service call, labor, helper, materials, flashing, disposal, moisture dryout, interior patch, travel, permits, tax and OH&P.
Planning tool only — not a formal bid.

Leak Area (sq ft) Rough affected zone.

Severity

Roof Type

Access

Stories

Steep Roof (>8:12)

Region Labor Level

After-hours

Emergency/Storm

Diagnostic Hours

Repair Hours

Helper Hours

Travel Miles (round trip)

Flashing/Boot LF

Sealant (qty)

Underlayment (sq ft)

Materials List (optional, comma-separated keys) Available keys: shingle_small, flashing_kit, sealant, underlayment_roll, tile_piece, slate_piece, membrane_patch, metal_panel_piece, ice_shield_roll

Moisture Dryout (days)

Interior Patch Needed?

Photo/Report for Insurance?

Permit Fee ($)

Sales Tax Rate (0–12.5%)

Waive Visit Fee (promo/service plan) Check if the diagnostic visit fee is covered/waived.

Results will appear here

🔧 Recommended Roofing Tools & Supplies

Disclosure: This section contains affiliate links. As an Amazon Associate, we earn a small commission from qualifying purchases — helping us keep SmartRoofingCalculator free to use.

⚠️ Planning estimate only — confirm on-site conditions & code with licensed roofers. Moisture and interior repair costs can escalate quickly.

💡 Leak repair costs vary by access, roof type, and severity.

✅ Best Practices:
• Tarp or temporary dry-in if more rain is forecast.
• Use step flashing where roof meets vertical walls; counterflashing for chimneys.
• Continuous valley flashing improves water shedding on high-flow areas.
• Overlap flashing pieces 2–4 inches; seal all joints with approved roof cement.
• Nail at top edge of flashing to avoid leak paths.
• Use corrosion-resistant metals (galvanized, aluminum, copper); match to nearby materials.
• Inspect attic & sheathing for hidden damage; replace compromised decking.
• Document with photos for insurance and future maintenance.
• Confirm local code for permits and underlayment/ice-shield requirements.
• On flat roofs, use compatible membrane patches (TPO/EPDM/PVC) and primers.

❓ FAQ — Leak Repair Basics

Q: What drives leak repair cost the most?
A: Access difficulty, roof type, severity, after-hours/emergency multipliers, and trim/flashing complexity.

Q: Does this include full reroof?
A: No. This is a repair estimator only (visit, labor, materials, trim, extras, OH&P, tax).

Q: Why is after-hours more expensive?
A: Overtime labor, limited supplier access, and urgent mobilization increase costs.

Q: What about interior damage?
A: Use the “Interior Patch Needed” toggle and “Moisture Dryout” days to include allowances.

Get the Smart Utility App

💧 Roof Leak Repair Cost Estimator

🔧 Recommended Roofing Tools & Supplies

🔧 Recommended Roofing Tools & Supplies