Metal Roof Dead Valley

I m looking for advice on re roofing a section of our roof where a valley meets a wall.

Metal roof dead valley.

Dead valleys occur when two slopes come together in a way that does not allow proper natural drainage or very slow drainage. This is known as a dead valley. One method of dealing with the special problems of metal valleys is the installation of valley flashing. I have my valley custom made with water trough to help with leaking.

A dead valley is created when two sections of the roof meet at their downhill edges causing a low slope of roofing section that must accommodate a large amount of water. You may notice although it can sometimes be hard to see some areas where the roof drains onto lower pitched or reverse pitched areas that don t naturally drain. Metal pans can solve the problem on many roof types. A dead valley is created when two or more slopes meet or when a roof slope meets a wall where water can not easily runoff the roof.

They ll just run a bunch of shingles down with some felt paper and expect it to last. This typically results in ponding because the water has nowhere to flow. How to flash a metal roof. If that s the case you ll probably get a leak in three to seven years in that spot.

The problem begins when a roofer doesn t handle the dead valley roof correctly. Valley is 15 feet long and the last foot of the valley water will slam into the wall. A quick step by step guide on how to flash a metal roof. I had the contractor install a w metal valley to prevent to much run off but now during winter the lower slope towards the end of the valley is causing some major ice damming and has actually caused a small leak in my garage.

Typical issues with metal roof valleys include debris collection improperly lined shingles faulty underlayment and problems with cascading water flowing across the valley and beneath shingles on the adjacent slope. These areas are very low sloped and sometimes completely flat. With metal roofs dead valleys are usually made more efficient with different types of membranes or other roofing materials. With a clean valley you can lay down some peel and stick roofing membrane.

First clean the debris out of the valley including sawdust nails and whatever else is in there. Fold the top over the roof ridge and cut the bottom along the drip edge metal. That s the dead valley.