Reverse Roof Valley

When deciding how to shingle a roof valley you will need to consider your materials the climate and the desired look of the roof.

Reverse roof valley. To do this we had to extend the plane of the shed roof out over the porch roof creating a small triangular extension of the existing roof. Soup to nuts riley shows the proper way of installing a valley on a roof. A valley s main function is to create runoff pathways to direct water flow from the roof planes into a valley trough. A reverse gable roof may be part of an addition or it may be a way to install a garage without adding a new roof.

Reverse gable roofs are typically perpendicular to the main roof of the house or building. The three methods to shingle a roof valley. This recommendation includes iko s premium shingles. Iko recommends that you install architectural shingles with the open valley method for the best roof performance.

The bottom of our blind valley was about 30 inches short of the bottom of the porch roof so we extended the line of the valley down to the edge of the new roof. If you find that this is a problem then you will need to repair your roof valley before anything serious happens such as plaster loss or even major water damage. Plus cutting the closed cut valley shingles can happen after the rest of the roof is shingled. Soup to nuts riley shows the proper way of installing a valley on a roof.

The volume of water varies with the valley s length and slope. Shingle the addition roof letting the new shingles fold through the valley center and onto the old roof deck by at least 1 ft. If you have a roof valley in your home then you may find that your lead valley starts to leak or even to allow water to run onto the ceiling of the floor below. Bed the end of each shingle in a 2 in wide ribbon of roofing cement placed 4 in.

Re lay the shingles you removed from the existing roof. Closed cut valley even if i work toward the valley with three tab shingles cut valleys are faster than woven valleys hands down. The top joinery of both valleys when they meet on the same plane of roof is shown here. A dormer window is an example of a very common reverse gable roof.

Attach the valley in place with 1 1 4 inch roofing nails and a shingle hatchet or hammer. I have my valley custom made with water trough to help with leaking b. With a closed cut valley there s no need to shingle the two roof planes at the same time.