How To Install Metal Flashing Roof Valley

Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles.

How to install metal flashing roof valley.

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. Fold the top over the roof ridge and cut the bottom along the drip edge metal. Use fasteners to attach the panel to the structure making sure that there is complete compression of the sealant. Attach the flashing panel in place at the bottom.

Stop nailing 6 inches from the center. Now nail this first flashing at both its far ends. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Install an underlayment centered in the roof valley.

Step 6 install the flashing. Use tape sealant between the valley trim and the panel. Use 1 inch galvanized roofing nails. Recommended procedures of basic valley flashing installation.

Roof one side of the valley running the shingles across it. Install synthetic roofing. The top joinery of both valleys when they meet on the same plane of roof is shown here. I have my valley custom made with water trough to help with leaking b.

Lay the flashing down in the roof valley and start at the lower end of the roof. Apply an approximately 3 inch. With a clean valley you can lay down some peel and stick roofing membrane. 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.

Remember to caulk the underside of the flashing with a sealant. First clean the debris out of the valley including sawdust nails and whatever else is in there.