Flat Roof Valleys

To keep the porch roof framing as simple as possible we installed a structural ridge supported by posts at each end with the common rafters landing on top of the ridge.

Flat roof valleys.

Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Stop nailing 6 inches from the center. Using a pitch measuring tool that i d made we also determined that the exact pitch of the shed roof was 3 1 2 in 12. These valleys are common to many roofs.

We ve arranged our superb selection into grp valley troughs for tiled roofs and roof valley solutions for slate roofs. The cape cod style of architecture is one type of home that is traditionally free of valleys if there are no dormer windows on the roof. Drip edge metal valley flashing dormer chimney and kickout flashing are types of roof flashing that shed water away from the connections between roofs walls chimneys and other building assemblies. Many times valleys are created where the roof on the main part of the house meets the garage roof or when an addition is put on the.

Roof valleys are troughs that discard runoff water where two sections of sloped roof meet. Despite this flat roof valleys should never be built. We use rubber roof membranes. The valleys on many older houses comprise layers of roofing paper which can deteriorate over time.

The roof design is as essential to the proper function of a house as is the foundation plumbing or electrical design. A valley roof is formed when two portions of the roof meet at an inside angle. When a valley is flat like this one in the image it is more problematic. In the following pictures we show the process of repairing a valley area.

If you can t find it here give our friendly customer services team a call on 01752 692760 and they ll be glad to help you. Valleys are typically found where gable dormer roofs meet the main roof or when a house has angled wings or additions where two roof sections in different planes meet. Shingle the other side of the valley the same way. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles.

Roof one side of the valley running the shingles across it. Because of our experience in flat roofs we use better materials and techniques. Details and drawings of the fixation of valleys available as downloads in dwg dxf and pdf format free of charge. Blind valleys simplify framing.

The materials they use in valleys are inferior. Alwitra flat roof details.