Making A Roof Valley

Ensure ice and water protector has been installed along the valley first.

Making a roof valley.

To keep the porch roof framing as simple as possible we installed a structural ridge. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. Joining two roofs of different pitches blind valleys simplify framing. I begin the second side the side that will be cut by snapping a cutline 2 in.

Cut some strips the dimensions are not critical maybe 3 4 to 1 1 2 wide x roughly 5 6 long. With a clean valley you can lay down some peel and stick roofing membrane. The valley rafter is marked for a 12 in 17 pitch and then cut with a double bevel to fit into the ridge intersection. With a closed cut valley there s no need to shingle the two roof planes at the same time.

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. From the valley center. This video demonstrates the proper installation technique for installing roofing valleys. Measure the width of the sheet metal valley flashing.

Typical valley flashing is 14 inches wide. Plus cutting the closed cut valley shingles can happen after the rest of the roof is shingled. Get some of the flashing material that matches your valley flashing in metal and thickness. Then starting at the base of the.

Fold the top over the roof ridge and cut the bottom along the drip edge metal. Where the porch roof extended over the shed roof we installed a 2x6 ridge that ran from the top of the. Start at the upper row of shingles at the upper end of the. Position an extension ladder against the lower edge of the roof near the valley that is repaired.

Make metal roof valley clips cleats. The open woven and closed cut methods are demonstrated.