Step Flashing Low Pitch Roof

1 cover the entire surface with a self adhesive flashing membrane such as grace ice water shield there are many equivalent products.

Step flashing low pitch roof.

Step flashing protects the gap where roofs meet walls by weaving into the roof shingles. Proper flashing design is the responsibility of the roof designer. The installer tacked a row of asphalt shingles to the wall caulked their top edge and hoped for the best. Step flashing fits to each course of shingles and appears to step up the wall of the chimney.

Vent pipe flashing fits over flues or pipes. Rain should run off the roof and into the gutter. Self adhesive flashing membrane under the shingles prevents leakage on low slope roofs. Flashing problems account for the majority of roof leaks on low slope built up roof systems.

At the bottom of the roof water needs to be directed. It is used for roof to wall flashing. Above we show a feeble attempt at flashing and counter flashing at the roof wall intersection of a low slope roof. Step flashing is a rectangular piece of flashing bent 90 degrees in the center.

Roll out and cut roll roofing to cover the length of the roof. It is used for roof to wall flashing. Place the top edge of the roofing along the chalk line. L flashing can be cut into smaller lengths to use as step flashing.

Step flashing offers far better protection from leaks because even if a single piece of step flashing fails the water just hits the next lower piece. For a low slope residential roof there are two main options. The membrane will outlast the shingles and seal around all nail penetrations. Multiple pieces of the flashing will be installed in layers with shingles to ensure the water flows away from the wall.

Made with 28 gauge galvanized steel l flashing can play an essential part in protecting your home against water damage. Step flashing protects the joints between the roof deck and chimneys or dormers. Required tools for this project. Adequate research of flashing conditions and the use of proper flashing details is vital to the long term success of the roof system.

Then apply standard asphalt shingles over the membrane. That flashing directs the water onto the shingle and the water drains down the roof. Step flashing in steep slope roofing donald berg p e professional roofing nrca june 1993.