Making A Roof Valley

This video demonstrates the proper installation technique for installing roofing valleys.

Making a roof valley.

The valley rafter is marked for a 12 in 17 pitch and then cut with a double bevel to fit into the ridge intersection. From the valley center. With a closed cut valley there s no need to shingle the two roof planes at the same time. The open woven and closed cut methods are demonstrated.

I begin the second side the side that will be cut by snapping a cutline 2 in. Plus cutting the closed cut valley shingles can happen after the rest of the roof is shingled. 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.

With a clean valley you can lay down some peel and stick roofing membrane. Measure the width of the sheet metal valley flashing. Fold the top over the roof ridge and cut the bottom along the drip edge metal. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing.

To secure the roof valley flashing nail it down carefully. Typical valley flashing is 14 inches wide. Get some of the flashing material that matches your valley flashing in metal and thickness. Make metal roof valley clips cleats.

Where the porch roof extended over the shed roof we installed a 2x6 ridge that ran from the top of the. Ensure ice and water protector has been installed along the valley first. Start at the upper row of shingles at the upper end 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.

Bend one end of each strip over roughly 3 4 to 1 but do not hammer it tightly flat. Only nail at the edges with only enough nails to.