Using Paper In A Roof Valley

Woven valley shingle installation.

Using paper in a roof valley.

The three methods to shingle a roof valley. Snap chalklines on both sides for guides. You can center it and align it smoothly with the roof contours as you go down. Use a broad strip of felt paper.

No matter which valley method you use for extra protection apply wsu at a valley. Closed cut valleys also called closed valleys are installed. First clean the debris out of the valley including sawdust nails and whatever else is in there. Roll out and smooth the wsu and drive a few nails on one side to hold it temporarily.

To achieve a woven valley installation a roofing professional lays shingles in the valley and weaves them. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. With a clean valley you can lay down some peel and stick roofing membrane. Lay the felt paper from the top of the roof valley to the eaves at the roof edge.

Start at the top. Fold the top over the roof ridge and cut the bottom along the drip edge metal.