2026 project cost
Repair Roof Flashing Cost
$702 to $1,378 for 20 linear ft, or about $35.12–$68.92 per linear ft. That covers 4 material line items and about 4 labor hours.
Estimate your repair roof flashing project
Adjust the linear feet of flashing to repair and state to re-price the job.
Estimated total
$702 – $1,378
materials + labor
What the materials cost
- Materials 72% · $987
- Labor 28% · $391
Quantities for 20 linear ft, including a 5% waste allowance.
| Material | Qty | Cost |
|---|---|---|
| Roof Flashing (Aluminum or Galvanized Steel) | 21 LF | $315 – $840 |
| 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 |
| Underlayment Patch | 10.5 SF | $5 – $16 |
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How long it takes
- 1
Inspection & Preparation 45 minutes
Examine roof flashing for damage or leaks, gather necessary tools, and ensure safe ladder placement in your area. Clean the area around the flashing to prepare for repair.
- 2
Removal of Damaged Flashing 45 minutes
Carefully remove old or damaged flashing using a pry bar and utility knife. Take care not to damage surrounding shingles or roofing materials in your area.
- 3
Installation of New Flashing 1.5 hours
Cut new flashing to size, slide it into place, and secure with roofing nails. Seal edges with roofing cement to prevent water intrusion in your area.
- 4
Reinstallation & Sealing 45 minutes
Replace any removed shingles, press them firmly, and apply additional roofing cement as needed. Ensure all seams and nail heads are sealed in your area.