How To Cut A Metal Roof Valley

Just simple 3d animated digital instructions on how to install a valley on a masterrib panel roof.

How to cut a metal roof valley.

With a clean valley you can lay down some peel and stick roofing membrane. Masterrib is a 36 wide 5 r. Fold the top over the roof ridge and cut the bottom along the drip edge metal. How to seal metal roof valley.

Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. Roofing shingles are installed then cut and sealed where they overlap the metal channel. With an open valley a strip of metal will be visible on the roof wherever two opposing roof planes meet. For an open valley a sheet of metal usually steel sometimes copper is fastened to the roof deck.

Low slope roofs slope less than 3 12 use tape sealant between the valley trim and the panel. Best practices for sealing the metal roof valley vary based on the slope of the roof. A variation of closed cut valley. When to choose a closed valley over an open valley.

Ultimately laying any shingle in a valley can restrict proper water and debris flow unlike the metal flashing used in an open 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. Cut the panels from the ground instead of on the roof to avoid damaging the roof with the debris. No sales pitch or other fluff.