How To Fix A Roof Valley

A chalk line can be used to guide you as you cut the shingles.

How to fix a roof valley.

As you install roof shingles on the second roof plane you allow them to lap over the valley on top of the first shingles. Cut each side of the flashing at the lower end to conform with the corresponding edges of the roof using sheet metal cutters. The right thing to do here is to pull a valley basically pull a valley apart and rebuild it. And you can tar it but it s a real stop gap band aid like measure.

The roofing nails are fine so long as the lead of the roof valley is intact but once it starts to crack or fracture due to water pressure corrosion or other damage the nail provides a space for water to run into the home. The shingles on the second layer are then cut ideally creating a clean line down the center of the valley. This is where two parts of the roof join. Check the entire roof valley carefully to locate the source of these problems.

Move to the highest end of the valley and work your way down cleaning shingles from both sides of the valley whether they re damaged or not. Clear any debris in the roof valley and surrounding area. Step 2 remove the 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.

If you have a roof leak it may well be through the valley. The top joinery of both valleys when they meet on the same plane of roof is shown here. 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. This method of lead valley repair is proven to not only be fast and safe wit.

This video shows the full repair from removing leaded va. Take measurements of your roof flashing most flashing is 14 inches wide but yours may vary. Cut each side at the upper end of the valley to conform with the. Follow these three preparatory steps to get ready to fix the valley leak.