How To Install A Plastic Roof Valley

Thin plywood linings are fitted over the valley boards to maintain a smooth finish under a lead lined valley.

How to install a plastic roof valley.

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. If fixing screws are left in the valleys your roof will leak in hundreds of places. No one of this affirmat.

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. 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. What was previously a valley in the corrugations will now be a ridge and the nail hole will be in the correct place. Roof one side of the valley running the shingles across it.

Roof installation how to shingle a valley hd by roofrepair101 more about roofing at. In this video i show you how i do the valleys on a shingle roof. You will have to paint the roof but is cheaper than buying new roofing. Dry fix valley troughs are mortar free providing hidden water gulleys at the roof valleys.

Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. The width of the open valley is dependent upon the roof pitch and the volume of water expected to drain into the gutter. Stop nailing 6 inches from the center. Additional eaves closure pieces and counter battens are not required and they create a close cut appearance.

Table 11 gives the minimum recommended valley widths for different roof pitches and plan areas. Shingle the other side of the valley the same way. 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.