Valley Of Roof Leaking

Just like in nature a valley on a roof is designed to collect water.

Valley of roof leaking.

Many roof valley leaks are caused by roofing nails that have been poorly placed and are acting as a dripper feeding water through from the roof above. A roof valley is very prone to leaks especially if you have an older roof. Most shingle installers will use a thick 30 lb paper as a base for the valley. Valley areas are prone to leak due to the lack of using proper materials.

Clear any debris in the roof valley and surrounding area. Follow these three preparatory steps to get ready to fix the valley leak. The most common cause of a roof leak where metal flashings are used is shingles that have been improperly cut. Move to the highest end of the valley and work your way down cleaning.

How to fix roof valley leaks remove debris remove all debris from roof valleys so nothing is touching your roof re shingle roof valleys install ice and water shield under shingles or install metal roof flashing and re shingle the valley. If that water doesn t shed off the roof fast enough or gets under the roofing material roof leaks will soon develop. When a shingle from either roof intersects and passes over the metal valley flashing it needs to be cut at an angle. Roof valleys if not installed correctly are one of the most leak prone areas on the roof.

The resulting cut is very similar to the angle you might see on the tip of a wood chisel. Most roofers that do shingles will use a heavy base paper instead of a rubber membrane. Take measurements of your roof flashing most flashing is 14 inches wide but yours may vary.