How To Roof A Valley

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.

How to roof a valley.

Shingle the other side of the valley the same way. The open woven and closed cut methods are demonstrated. 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.

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. 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.

Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Roof valleys are troughs that discard runoff water where two sections of sloped roof meet. A roof valley is very prone to leaks especially if you have an older roof. Stop nailing 6 inches from the center.

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 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. Roof one side of the valley running the shingles across it.

Many roofers cut the shingles across because they say it s safer. Shingling both a closed cut valley and a long island valley is the same for the first half of the process. Where two roof valleys meet for example above a gable dormer a soldered joint is likely to break from the movement. 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.

Iko recommends that you install architectural shingles with the open valley method for the best roof performance. The three methods to shingle a roof valley. Closed cut and long island roof valleys.