There are two common methods for completing the flashing of a valley in a shingle roof system.
How to shingle a dormer valley.
Punctures in the center of the valley.
Plus cutting the closed cut valley shingles can happen after the rest of the roof is shingled.
Closed cut shingle valley installation.
Installing corrosive type metal flashing in valley.
Start at the outward edge and lay a shingle across the ridge and nail with roofing nails.
Finish dormer wall shingles with wood trim typically 1 by 4 inch boards.
Closed valleys or open valleys.
To understand what makes a valley either.
Installing a closed valley a k a.
One layer of shingles actually crosses the valley beneath the other.
Continue shingling in this manner by overlapping the next shingle until you reach the valley.
Failure to extend the entire width of the metal valley flashing beyond the eave of the roof.
From the ground it looks as though the shingles meet in a clean line in the center of the valley.
Closed cut valleys also called closed valleys are installed quickly and have a cleaner sharper look than woven valleys.
Step 6 shingle ridge line.
Closed cut valley even if i work toward the valley with three tab shingles cut valleys are faster than woven valleys hands down.
Put trim on both dormer corners to cover shingle ends on both sides along the wall tops where they meet the roof and around a window.
Installing laced shingles in a roof valley when shingle manufacturer does not approve of.
With a closed cut valley there s no need to shingle the two roof planes at the same time.
Nail trim with corrosion resistant nails through the shingles into the dormer framing.
Weaving a shingle valley by dunn contracting 727 410 5717 james dunn.
Roof installation how to shingle a valley hd by roofrepair101 more about roofing at.
The top of the roof dormer is shingled across the ridge line.