Reverse Roof Valley

Bed the end of each shingle in a 2 in wide ribbon of roofing cement placed 4 in.

Reverse roof valley.

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. The top joinery of both valleys when they meet on the same plane of roof is shown here. They occur on primary roof areas and where projections such as dormers break the plane of the main roof. The volume of water varies with the valley s length and slope.

This recommendation includes iko s premium shingles. With a closed cut valley there s no need to shingle the two roof planes at the same time. 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. Cut each side at the upper end of the valley to conform with the corresponding slopes of the roof.

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. A dormer window is an example of a very common reverse gable 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.

Shingle the addition roof letting the new shingles fold through the valley center and onto the old roof deck by at least 1 ft. Iko recommends that you install architectural shingles with the open valley method for the best roof performance. Reverse gable roofs are typically perpendicular to the main roof of the house or building. Re lay the shingles you removed from the existing roof.

Soup to nuts riley shows the proper way of installing a valley on a roof. Plus cutting the closed cut valley shingles can happen after the rest of the roof is shingled. The three methods to shingle a roof valley. Soup to nuts riley shows the proper way of installing a valley on a roof.

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. A valley s main function is to create runoff pathways to direct water flow from the roof planes into a valley trough. Attach the valley in place with 1 1 4 inch roofing nails and a shingle hatchet or hammer.