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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.

linear ft

Estimated total

$702 – $1,378

materials + labor

Materials—
Labor—
Per linear ft—

What the materials cost

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. 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. 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. 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. 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.

Frequently asked questions

Do I need a permit to repair roof flashing in your area?

In most of your area, repair roof flashing is treated as maintenance rather than structural work, so no building permit is required. A permit does become necessary if the job expands into replacing the roof covering or the decking beneath it. Confirm with your local building department in your area before work starts.

Is repair roof flashing covered by a home warranty or insurance?

Routine work like this is normally treated as owner maintenance, so home warranties and insurance policies rarely cover it. Insurance generally applies only when the damage comes from a sudden covered event such as a storm. Check your policy terms for your area before assuming coverage.

What is roof flashing and why is it important?

Roof flashing is a material used to prevent water from entering a structure at a joint or intersection. It is crucial for maintaining the integrity of the roof and preventing leaks in your area.

How often should roof flashing be inspected in your area?

Roof flashing should be inspected at least once a year in your area, especially after severe weather conditions. Regular inspections help identify potential issues before they become major problems.

Can I repair roof flashing myself or should I hire a professional?

While minor repairs can be done by a skilled homeowner, hiring a professional in your area ensures the job is done correctly and safely. Professionals have the expertise to handle complex repairs and ensure compliance with local codes.

Calculators for this project

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