How To Cut A Metal Roof Valley

When to choose a closed valley over an open valley.

How to cut a metal roof valley.

Fold the top over the roof ridge and cut the bottom along the drip edge metal. No sales pitch or other fluff. For an open valley a sheet of metal usually steel sometimes copper is fastened to the roof deck. Cut the panels from the ground instead of on the roof to avoid damaging the roof with the debris.

Ultimately laying any shingle in a valley can restrict proper water and debris flow unlike the metal flashing used in an open valley. Masterrib is a 36 wide 5 r. With a clean valley you can lay down some peel and stick roofing membrane. How to seal metal roof valley.

One variant of the closed cut valley is the california valley also called long island valley and new jersey valley. Best practices for sealing the metal roof valley vary based on the slope of the roof. A variation of closed cut valley. Just simple 3d animated digital instructions on how to install a valley on a masterrib panel roof.

Low slope roofs slope less than 3 12 use tape sealant between the valley trim and the panel. With an open valley a strip of metal will be visible on the roof wherever two opposing roof planes meet. The shingles are then cut out of the valley area opening the surface of the valley lining to water run off and the environment. California cut valleys make for a great closed cut valley however we have an installation trick to improve performance in areas of high winds snow or rain.