How To Waterproof Roof Valley

Step 2 remove the shingles. Check the entire roof valley carefully to locate the source of these problems. Lay a shingle on the valley without fixing it and see how the rest of them should be installed.

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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.

How to waterproof roof valley.

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. Secure it with roofing nails. Roll it down and then secure it with roofing nails. Snap two chalk lines from the ridge to the eaves 8 cm apart increasing in width by 1 cm per meter towards the eaves.

Now roll out the roofing material and make it 18 inches wide from the center of the valley. Trim the shingles to these lines and cut a 5 cm triangle off the top corner to direct the water into the valley. To waterproof it use roofing tar along the edges. This video is about how to install peel n stick in valley.

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. In order to lay the flashing the shingles on the roof will have to be removed. Nail the shingles 5 cm back from the chalk line. A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water.

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.

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