How To Install Valley Flashing On A Metal Roof

Metal valley trim also known as metal valley flashing is beneficial because it drains water away from the structure of your metal building which helps prevent moisture damage.

How to install valley flashing on a metal roof.

When installing metal valley flashing there are a few things to keep in mind from cutting metal roofing to sealing the flashing. 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. I have my valley custom made with water trough to help with leaking b. Stop nailing 6 inches from the center.

Roof one side of the valley running the shingles across it. An open valley relies on metal flashing for protection. Shingle the other side of the valley the same way. Installing metal flashing for your roof project is a challenging but essential step to take to ensure that the new roof remains as weatherproof and as strong as possible the following steps will explain how to install metal flashing in roof valleys.

Recommended procedures of basic valley flashing installation. Install an underlayment centered in the roof valley. Lap successive sheets of metal flashing a minimum of 12 inches and seal laps. While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately.

Flashing should be installed in all of the valleys. The top joinery of both valleys when they meet on the same plane of roof is shown here. Then install a non corrosive metal valley flashing of 24 minimum width. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley.

Open valleys have metal flashing to protect this critical area of the roof. Open valley shingle installation. The edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak. That flashing is left exposed so the roof has visible lines of metal running down the valley.