2026 project cost
Repair Roof Valley Cost
$1,851 to $2,862 for 20 linear ft, or about $92.54–$143.11 per linear ft. That covers 5 material line items and about 6 labor hours.
Estimate your repair roof valley project
Adjust the valley length and state to re-price the job.
Estimated total
$1,851 – $2,862
materials + labor
What the materials cost
- Materials 80% · $2,276
- Labor 20% · $587
Quantities for 20 linear ft, including a 5% waste allowance.
| Material | Qty | Cost |
|---|---|---|
| Asphalt Shingles | 42 BUNDLE | $1,260 – $2,016 |
| 20.0-in x 50.0-ft Silver Galvanized steel Roll flashing | 1.05 EA | $47 – $95 |
| 301 4.75-gallon Fibered Roof Sealant | 1.05 EA | $51 – $72 |
| 2-in Smooth Shank Electro-galvanized Roofing Nails 3817 -Per Box | 1.05 BOX | $42 – $60 |
| Roofing Underlayment | 42 SF | $17 – $34 |
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How long it takes
- 1
Inspection & Preparation 1 hour
Examine the roof valley in your area for damaged shingles, flashing, or debris. Gather necessary tools and materials, and ensure the area is safe to work on.
- 2
Removal of Damaged Materials 1-1.5 hours
Carefully remove old shingles, nails, and flashing from the affected valley section in your area. Clean the valley to ensure a solid base for repairs.
- 3
Installation of New Flashing 1-1.5 hours
Cut and fit new metal flashing into the roof valley in your area, securing it with roofing nails and ensuring proper overlap for water runoff.
- 4
Shingle Replacement & Sealing 1.5-2 hours
Install new shingles over the flashing, aligning them with existing rows in your area. Seal all edges and nail heads with roofing cement to prevent leaks.
- 5
Final Inspection & Cleanup 30 minutes
Check the repaired valley in your area for proper installation and watertightness. Remove debris and ensure the work area is clean and safe.