Reverse Roof Valley

Soup to nuts riley shows the proper way of installing a valley on a 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. This recommendation includes iko s premium shingles. Shingle the addition roof letting the new shingles fold through the valley center and onto the old roof deck by at least 1 ft. Up from the valley center.

A valley s main function is to create runoff pathways to direct water flow from the roof planes into a valley trough. 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. 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. With a closed cut valley there s no need to shingle the two roof planes at the same time.

Iko recommends that you install architectural shingles with the open valley method for the best roof performance. A dormer window is an example of a very common reverse gable roof. The volume of water varies with the valley s length and slope. Closed cut valley even if i work toward the valley with three tab shingles cut valleys are faster than woven valleys hands down.

Attach the valley in place with 1 1 4 inch roofing nails and a shingle hatchet or hammer. 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. Cut each side at the upper end of the valley to conform with the corresponding slopes of the roof. 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.

They occur on primary roof areas and where projections such as dormers break the plane of the main roof. Re lay the shingles you removed from the existing roof. I have my valley custom made with water trough to help with leaking b. Soup to nuts riley shows the proper way of installing a valley on a roof.

When deciding how to shingle a roof valley you will need to consider your materials the climate and the desired look of the roof. The top joinery of both valleys when they meet on the same plane of roof is shown here. Bed the end of each shingle in a 2 in wide ribbon of roofing cement placed 4 in.