How To Repair Shingle Roof Valleys

The roof valley is where two angles of the roof come together and form a valley.

How to repair shingle roof valleys. Roof valleys are channels designed to drain runoff water and like any other part of your roof they can degrade over time with exposure to the elements. Plus cutting the closed cut valley shingles can happen after the rest of the roof is shingled. High winds sometimes blow shingles away from the roof valley particularly if the edges of the shingles are not nailed in place because of shingle strain described above. Though roof valleys are com mon leak sites on shingle roofs it s typically fairly easy to fix these problems with a little know how.

Shingle the other side of the valley the same way. Roof one side of the valley running the shingles across it. A woven valley shingle installation has other drawbacks including that they are slow to install especially in cold weather and more difficult to repair than the other types. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles.

Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Closed cut valley even if i work toward the valley with three tab shingles cut valleys are faster than woven valleys hands down. In order to shingle this kind of roof valley a roofing professional has to install both roof faces at the same time which is quite slow. With a closed cut valley there s no need to shingle the two roof planes at the same time.

The valleys on many older houses comprise layers of roofing paper which. Damage to the roof and interior can be minimized or eliminated if a homeowner replaces the affected. Cut roof valleys also can easily be dislodged because of rain and wind. In other cases water can become trapped under shingles which have been overlaid to create the valley trough.

Stop nailing 6 inches from the center. Roof valleys are troughs that discard runoff water where two sections of sloped roof meet.