How To Roof Over Metal Valley Flashing

Failure to extend the entire width of the metal valley flashing beyond the eave of the roof.

How to roof over metal valley flashing.

Punctures in the center of the valley. Fasteners placed in the exposed center area. Valley flashing is metal or sometimes peel and stick material that protects an important area on the roof where two slopes come together to form a valley. Avoid the following common errors.

Open valleys have metal flashing to protect this critical area of the roof. I have my valley custom made with water trough to help with leaking b. Properly sized and installed valley flashing is key to channeling water safely off the roof. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles.

Some homeowners do not like the look of open valleys while others feel the metal accentuates the roof s shape particularly if copper or painted flashing is used. That flashing is left exposed so the roof has visible lines of metal running down the valley. In addition it is important to avoid nailing the shingles through the valley metal. Fold the top over the roof ridge and cut the bottom along the drip edge metal.

Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Roof mastic applied along sides of valley flashing. Stop nailing 6 inches from the center. This video shows the water proofing paper that we installed after re.

Shingle the other side of the valley the same way. With a clean valley you can lay down some peel and stick roofing membrane. However these shingles are not run entirely through the valley area but rather the center of the metal valley is left exposed. How to install roofing paper in a valley section and install the valley flashing on top.

As the asphalt shingles are installed over the roof deck the shingles are extended into the valley. The top joinery of both valleys when they meet on the same plane of roof is shown here. Roof one side of the valley running the shingles across it. While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately.

The edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak.