How To Seal Roof Valleys

Sealing metal roof valleys watertight fix valleys where two rooflines meet are typical problem areas on metal roofs.

How to seal roof valleys. 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. A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water. Remove 8 inches of shingles at each side of the valley with a 16 inch nail bar. Though roof valleys are com mon leak sites on shingle roofs it s typically fairly easy to fix these problems with a little know how.

Inserting valley seal under concrete tiles this stops back flowing of rain in heavy storms. Ensure ice and water protector has been installed along the valley first. Step 2 remove the shingles. Only nail at the edges with only enough nails to.

Using 3 layers of thermal tec s mr multi ply roof system where most of the movement occurs will provide a watertight seal in these areas. Unlike traditional cemented valleys modern valley seal wont break down. Start at the upper row of shingles at the upper end of the valley. This video shows the traditional and best way to repair a lead valley on a roof.

In order to lay the flashing the shingles on the roof will have to be removed. This method of lead valley repair is proven to not only be fast and safe wit. 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. Check the entire roof valley carefully to locate the source of these problems.

To secure the roof valley flashing nail it down carefully. Insert the bar under a shingle and pry upward at a. In other cases water can become trapped under shingles which have been overlaid to create the valley trough.