How To Install Metal Flashing Roof Valley

With a clean valley you can lay down some peel and stick roofing membrane.

How to install metal flashing roof valley. Use fasteners to attach the panel to the structure making sure that there is complete compression of the sealant. Remember to caulk the underside of the flashing with a sealant. Fold the top over the roof ridge and cut the bottom along the drip edge metal. Roof one side of the valley running the shingles across it.

First clean the debris out of the valley including sawdust nails and whatever else is in there. Make sure that the end of the flashing panel is perfectly in line with the edge of the roof. Install valley battens on both ends of the roof valley then attach first flashing 3 4 inches over the roof flange and another 3 4 inches over the fascia if any is present. Shingle the other side of the valley the same way.

Stop nailing 6 inches from the center. The top joinery of both valleys when they meet on the same plane of roof is shown here. Recommended procedures of basic valley flashing installation. I have my valley custom made with water trough to help with leaking b.

Use 1 inch galvanized roofing nails. Apply an approximately 3 inch. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Steep slope roofs slope greater than 3 12 cut the panels at an angle for the valley then bend the hem end of the panel and hook it with a cleat.

Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. Install an underlayment centered in the roof valley. Use tape sealant between the valley trim and the panel. Install synthetic roofing.

Lay the flashing down in the roof valley and start at the lower end of the roof. Attach the flashing panel in place at the bottom.