Valley areas are prone to leak due to the lack of using proper materials.
Valley of roof leaking.
The most common cause of a roof leak where metal flashings are used is shingles that have been improperly cut.
Follow these three preparatory steps to get ready to fix the valley leak.
Roof valleys if not installed correctly are one of the most leak prone areas on the roof.
Take measurements of your roof flashing most flashing is 14 inches wide but yours may vary.
Most roofers that install shingles will not have rubber membranes with them to do such areas.
Because roof valleys function as a drain on the roof they receive as disproportionate volume of water every time it rains.
Clear any debris in the roof valley and surrounding area.
When a shingle from either roof intersects and passes over the metal valley flashing it needs to be cut at an angle.
Move to the highest end of the valley and work your way down cleaning.
A roof valley is very prone to leaks especially if you have an older roof.
Most roofers that do shingles will use a heavy base paper instead of a rubber membrane.
If that water doesn t shed off the roof fast enough or gets under the roofing material roof leaks will soon develop.
The resulting cut is very similar to the angle you might see on the tip of a wood chisel.
Just like in nature a valley on a roof is designed to collect water.
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.