How to Install Step Flashing Under Siding
Keep water out of your home and running down the roof where it goes with use of step flashing. Step flashing is used where a roof meets a wall, to cover those elements’ junction . Flashing is a strip of metal, typically aluminum and bent at 90 degrees with each side five or more inches wide. On a wall cement board , the step flashing, metal or vinyl siding, and roofing that was related, must be installed first, so the siding will cover the surface of the step.
Slice of flashing in the bottom of the roof with tin snips to the first bit across the bend line about 4 inches. . Fold the roofing of the flashing down over the board across the roof . Bend the perpendicular edge at approximately a 45-degree angle to create a tab to”kick out” water, away from the wall and above the bottom of the roof. Nail the flashing to the wall with a hammer and two galvanized roofing nails.
Lay a shingle over the step. Fasten that shingle with two nails at the top, then cover its surface with a different piece of step flashing. So there aren’t any open seams work the roofing up in steps, covering each end with flashing of flashing with each end of a shingle and a shingle. Option flashing and shingles to the roof peak.
Cut a piece of flashing across the bend line about half of the amount of the strip to flash the peak of the roof. Bend the flashing down over the peak’s roof edge and nail the wall side to the sheathing. Install a reverse peak flashing to the other side of this roof, so both wall borders overlap in an”X.” Nail step flashing at a peak so that the roof side extends over peak flashing on the roof.
Cover each side of the roof with step flashing and shingles from the eave to the peak. Caulk the joints of flashing in the peak.
Siding on the walls down to the flashing. Leave a gap between the step flashing and timber siding or cement board. Nail J-channel for metal or vinyl siding on the flashing; follow the directions of the siding manufacturer for installation of these substances.