How To Waterproof Roof Valley

Roll it down and then secure it with roofing nails.

How to waterproof roof valley. Hazlett s process involves using specialized tools such as a utility knife fitted with a hook blade a roofer s pry bar and a metal seamer. Step 2 remove the shingles. Secure it with roofing nails. Once the roof valley has begun to leak you will need to cover the valley with flashing in order to prevent a repeat of the problem.

Snap two chalk lines from the ridge to the eaves 8 cm apart increasing in width by 1 cm per meter towards the eaves. Check the entire roof valley carefully to locate the source of these problems. Now roll out the roofing material and make it 18 inches wide from the center of the valley. Lay a shingle on the valley without fixing it and see how the rest of them should be installed.

In order to lay the flashing the shingles on the roof will have to be removed. To waterproof it use roofing tar along the edges. If the ice and water shield is missing then you will have to remove the shingles on both sides along the valley put ice and water shield in place and re shingle the roof. His technique begins with the careful removal of old shingle the placement of a waterproof membrane and the installation of valley flashing followed by the replacement of the roof shingles.

A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water.