Making A Roof Valley

Joining two roofs of different pitches blind valleys simplify framing.

Making a roof valley.

Where the porch roof extended over the shed roof we installed a 2x6 ridge that ran from the top of the. To secure the roof valley flashing nail it down carefully. From the valley center. This video demonstrates the proper installation technique for installing roofing valleys.

Measure the width of the sheet metal valley flashing. With a closed cut valley there s no need to shingle the two roof planes at the same time. Then starting at the base of the. Only nail at the edges with only enough nails to.

Fold the top over the roof ridge and cut the bottom along the drip edge metal. Get some of the flashing material that matches your valley flashing in metal and thickness. 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. Position an extension ladder against the lower edge of the roof near the valley that is repaired.

The open woven and closed cut methods are demonstrated. With a clean valley you can lay down some peel and stick roofing membrane. Bend one end of each strip over roughly 3 4 to 1 but do not hammer it tightly flat. Start at the upper row of shingles at the upper end of the.

Typical valley flashing is 14 inches wide. Ensure ice and water protector has been installed along the valley first. 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.

The valley rafter is marked for a 12 in 17 pitch and then cut with a double bevel to fit into the ridge intersection. Plus cutting the closed cut valley shingles can happen after the rest of the roof is shingled.