Flat Roof Valleys

Roof valleys are troughs that discard runoff water where two sections of sloped roof meet.

Flat roof valleys.

Building a flat roof valley is no different than a plumber installing a drainpipe that is flat for a few feet just to accommodate some aesthetic feature. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. In the following pictures we show the process of repairing a valley area. A valley roof is formed when two portions of the roof meet at an inside angle.

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. Despite this flat roof valleys should never be built. Stop nailing 6 inches from the center. 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.

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. Shingle the other side of the valley the same way. The valleys on many older houses comprise layers of roofing paper which can deteriorate over time. When a valley is flat like this one in the image it is more problematic.

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. Roof one side of the valley running the shingles across it. The materials they use in valleys are inferior. These valleys are common to many roofs.

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. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. 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. 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.

The valley area of a roof the straight lines formed when two different planes of the roof meet is a critical area that handles a tremendous amount of water run off. The roof design is as essential to the proper function of a house as is the foundation plumbing or electrical design. Blind valleys simplify framing. We use rubber roof membranes.

Looking for something specific. Because of our experience in flat roofs we use better materials and techniques.