Making A Roof Valley

The open woven and closed cut methods are demonstrated.

Making a roof valley.

I begin the second side the side that will be cut by snapping a cutline 2 in. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. With a closed cut valley there s no need to shingle the two roof planes at the same time. Ensure ice and water protector has been installed along the valley first.

From the valley center. Plus cutting the closed cut valley shingles can happen after the rest of the roof is shingled. Make metal roof valley clips cleats. To secure the roof valley flashing nail it down carefully.

The valley rafter is marked for a 12 in 17 pitch and then cut with a double bevel to fit into the ridge intersection. Only nail at the edges with only enough nails to. Joining two roofs of different pitches blind valleys simplify framing. Start at the upper row of shingles at the upper end of the.

This video demonstrates the proper installation technique for installing roofing valleys. Typical valley flashing is 14 inches wide. Then starting at the base of the. On the common rafters the plumb cut is marked with a framing square for a 12 in 12 pitch 45 and cut square i e no bevel.

Cut some strips the dimensions are not critical maybe 3 4 to 1 1 2 wide x roughly 5 6 long. Position an extension ladder against the lower edge of the roof near the valley that is repaired. To keep the porch roof framing as simple as possible we installed a structural ridge. Bend one end of each strip over roughly 3 4 to 1 but do not hammer it tightly flat.

With a clean valley you can lay down some peel and stick roofing membrane. Measure the width of the sheet metal valley flashing.