How To Install A Plastic Roof Valley

For better results try to use full size shingles going into a closed valley one without metal flashing as this can eliminate nailing too close to the centerline.

How to install a plastic roof valley. Shingle the other side of the valley the same way. Stop nailing 6 inches from the center. In this video i show you how i do the valleys on a shingle roof. Roof installation how to shingle a valley hd by roofrepair101 more about roofing at.

All our valley troughs are made from glass reinforced plastic grp an excellent alternative to lead. No one of this affirmat. Many roofers cut the shingles across because they say it s safer. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley.

In order to shingle this kind of roof valley a roofing professional has to install both roof faces at the same time which is quite slow. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. Where possible install three tab shingles so that the tabs falling over metal valleys or rake edges at the side of the house are at least four inches wide. A woven valley shingle installation has other drawbacks including that they are slow to install especially in cold weather and more difficult to repair than the other types.

Dry fix valley troughs are mortar free providing hidden water gulleys at the roof valleys. Remove roofing and turn each sheet over. You will have to paint the roof but is cheaper than buying new roofing. Roof one side of the valley running the shingles across it.

Table 11 gives the minimum recommended valley widths for different roof pitches and plan areas. The width of the open valley is dependent upon the roof pitch and the volume of water expected to drain into the gutter. Thin plywood linings are fitted over the valley boards to maintain a smooth finish under a lead lined valley.