How To Roof A Valley

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

How to roof a valley.

Shingling both a closed cut valley and a long island valley is the same for the first half of the process. 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. No one of this affirmat. A roof valley is very prone to leaks especially if you have an older roof.

Roof one side of the valley running the shingles across it. Gaf mastering the roof chapter 12 this video demonstrates the proper installation technique for installing roofing valleys. Many roofers cut the shingles across because they say it s safer. For the next two shingling methods closed cut and long island valleys i work out of the valley using laminated shingles instead of working toward the valley with three tab shingles.

Valleys are a prime leak area so it s important to be careful. You can see in our roof valley photo left that there has been a history of. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. Where two roof valleys meet for example above a gable dormer a soldered joint is likely to break from the movement.

Roof valleys are troughs that discard runoff water where two sections of sloped roof meet. Iko recommends that you install architectural shingles with the open valley method for the best roof performance. Closed cut and long island roof valleys. 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.

Stop nailing 6 inches from the center. The three methods to shingle a 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. The valleys on many older houses comprise layers of roofing paper which can deteriorate over time.

The reason why the roof valley is such a sensitive area has to do with all the rainwater and or melting snow that accumulates and flows through the valley on its way into the gutters. This recommendation includes iko s premium shingles. Overlap metal roof valley sections by 12 inches and seal the lap with a flexible sealant such as polyurethane or butyl on roofs shallower than 5 12.