Nailing Down Roof Flashing

Open valleys have metal flashing to protect this critical area of the roof.

Nailing down roof flashing.

Nail it down exactly as you did the 18 inch roofing. Renew flashing seals by chipping out old caulking and mortar along the edges of the flashing. Nails should be long enough to penetrate 3 4 into the wood deck lumber or completely through plywood decking. Sizes and quantities commonly used on a new roof 1 1 4 320 nails per sq.

A 153 for hot dip zinc coating. The flashing is nailed in place after the ledger and deck. While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately. Over an old roof 1 3 4 320 nails per sq.

Recaulk the joints between the roof and the flashing. Roofing nail should have a barbed shank until the head which eliminates nail pops blow offs and roof leaks. Overlap two pieces of flashing that meet end to end by at least 1 inch. Roofing cement can dry out and crumble away exposing joints to water.

Use 1 inch galvanized roofing nails or 3 4 inch exterior screws. Install the drip edge by fitting it on the roof eave pushing it tightly against the edge of the plywood and nailing or screwing it down. Watch more home repair diy videos. Sheet metal flashing prevents water from seeping into the seam between a deck ledger board and a building.

Place a sheet of 36 inch roll roofing directly over the 18 inch roofing that is covering the valley. A large nail head and heavier shank gauge provide greater holding power. Fasten drip edge on eaves with galvanized nails and a hammer about 12 inches. Space the fasteners by about 12 inches.

A roofing nail should have a minimum nominal shank diameter of 12 gauge 2 67 mm and a minimum head diameter of 9 5 mm. All maze nails are 100 made in the u s a. Fasten loose nails and cover exposed nail heads with roofing cement. How to nail deck flashing.