Cost to Repair a Roof Valley
Repairing a roof valley means removing damaged shingles and old flashing, cleaning the exposed valley, then sealing a new flashing piece or sheet-metal patch with roofing cement before replacing the shingles. Homeowners commonly address this work when the valley has damaged shingles, failed flashing, holes, cracks, or signs of water damage. The work is difficult because the repair requires opening both sides of the valley and working safely on a roof.
Common reasons homeowners do this job
- Damaged shingles in the valley
- Old or damaged flashing
- Holes in the valley joint
- Cracks in the exposed valley material
- Signs of water damage around the valley
DIY or call a pro?
This is a legitimate DIY repair, but it is a hard one. Consider a roofing professional if removing shingles on both sides of the valley, assessing the exposed material, or cutting and fitting the flashing or metal patch feels uncomfortable. Working on a roof creates a significant fall hazard, so use proper fall-protection equipment, set ladders on stable, level ground, and work only in dry, calm, ice-free conditions.
Frequently asked questions
- Can I repair a roof valley myself, or is it better to hire someone?
- A homeowner can handle this repair if they can safely work on a roof and are comfortable removing shingles, cleaning the valley, and fitting a new flashing piece or metal patch. Consider hiring help when the exposed valley is difficult to assess or the flashing work is beyond your comfort level. Proper fall protection and stable ladder setup are essential.
- What makes a roof valley repair cost more?
- The price rises with the size and scope of the repair, labor time, and the materials needed. Haul-away of removed shingles or flashing can add to the total, and a small repair may still involve a minimum or trip charge.
- How large should a metal patch be for a damaged roof valley?
- Cut the sheet-metal patch or replacement flashing so it is at least 2 inches larger than the damaged area. Determine the needed patch size after removing shingles on both sides of the valley and inspecting the underlying material.
- What preparation is needed before sealing a roof valley patch?
- Remove the damaged shingles and old flashing, then thoroughly clean the exposed valley with a wire brush to remove debris and old sealant. Roofing cement goes beneath the patch and again along its edges after it is secured.
Have a different situation?
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