Step Roof Flashing Details

Wind driven rain and snow can penetrate between step flashing pieces and wet the sidewalls and the roof.

Step roof flashing details.

The second piece should not be fastened to the base so the two pieces can move against each other independently when the roofing materials shift. Two part flashing systems consist of a base flashing often step flashing that is laced into the finished roof material. More product details close. Step flashing protects the interface between a roof and a wall from water leaks that can cause hidden damage for years.

Sweat the details or you ll drown in them this presentation is by doug horgan vp of bowa a design build remodel and consultation company in northern virginia. Step flashing is a rectangular piece of flashing bent 90 degrees in the center. Continuous flashing is sometimes seen where a roof meets a sidewall but in the long run step flashing will do a better job of preventing water leaks. The term reglet flashing refers to an installation method for counter flashing not a separate layer.

So we instruct our roofers to run the ice barrier membrane and the roof underlayment up the sidewalls. Counter flashing is the final layer of a three part waterproof barrier installed between a roof and a vertical wall or chimney. It is used for roof to wall flashing. It is used for roof to wall flashing.

The base is then covered by another metal flashing piece lapped over it. Stepped flashing is used where a sloped shingled roof intersects a vertical wall. We ask for 6 inches up the wall. L flashing can be cut into smaller lengths to use as step flashing.

L shaped flashing is a versatile general use flashing used where a uniform or strengthened finish is needed on a 90 surface. Multiple pieces of the flashing will be installed in layers with shingles to ensure the water flows away from the wall. Rain should run off the roof and into the gutter. Step flashing can be made with aluminum copper lead galvanized steel or.

Step flashing redirects the water back onto the shingle. At the bottom of the roof water needs. Even if one piece of step flashing fails the flashing and shingle below it start the. Step flashings are interwoven with the shingles and act essentially as shingles with an upturned leg to allow a transition of the vertical drainage plane of the wall to the drainage plane of the roof.

Made with 28 gauge galvanized steel l flashing can play an essential part in protecting your home against water damage.