How To Cut A Metal Roof Valley

Roofing shingles are installed then cut and sealed where they overlap the metal channel.

How to cut a metal roof valley.

The metal is usually pre painted to best complement the shingles color blend. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. Masterrib is a 36 wide 5 r. The shingles are then cut out of the valley area opening the surface of the valley lining to water run off and the environment.

With a clean valley you can lay down some peel and stick roofing membrane. Cut the panels from the ground instead of on the roof to avoid damaging the roof with the debris. How to seal metal roof valley. A variation of closed cut valley.

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. With an open valley a strip of metal will be visible on the roof wherever two opposing roof planes meet. Ultimately laying any shingle in a valley can restrict proper water and debris flow unlike the metal flashing used in an open valley. No sales pitch or other fluff.

When to choose a closed valley over an open valley. Fold the top over the roof ridge and cut the bottom along the drip edge metal. One variant of the closed cut valley is the california valley also called long island valley and new jersey valley. For an open valley a sheet of metal usually steel sometimes copper is fastened to the roof deck.