Sidewall Flashing At Roof Lines

Pieces of step flashing are bent at an angle relative to the roof pitch and installed along the full length of the sidewall where it joins the roof deck. This article describes mistakes at roof dormer sidewall flashing and roof dormer sidewall coverings that invite leaks rot and insect damage on buildings. The solution to rotting sidewalls is a small piece of bent metal called a kickout flashing at roofing suppliers which simply directs all that water away from the wall.

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It s kind of like a step so water hits it comes off and moves off the roof.

Sidewall flashing at roof lines.

Roof flashing is a thin material usually galvanized steel that professional roofers use to direct water away from critical areas of the roof wherever the roof plane meets a vertical surface like a wall or a dormer. The flashing extends onto the roof a minimum of 2 inches 4 inches is preferable in more severe climate areas. The flashing should be partially exposed along the wall. The horizontal part of the flashing will vary depending on the type of roof covering material.

Another term for this is a step flashing. Step flashing should always be used where the roof deck meets a sidewall. Except where walls are brick the vertical part of the sidewall flashing should extend up behind the exterior wall covering just like with headwalls. We re going to install this step flashing here against the sidewall and the first thing we re going to do is let it run.

Here s how to install it correctly. Flashing joints are lapped 6 in the direction of water flow. We discuss the importance of keeping wood siding clear of the roof surface the need for flashing at the dormer side to roof intersection and the need for counter flashing at step flashing. A sidewall is a junction between a wall and a sloped portion of a roof.

Epdm flashing tape with a butyl adhesive backing will help. Installing step flashing to prevent roof leaks step flashing spans the joint between roof shingles and an adjacent side wall. Vent flashing done right to prevent leaks back up roof vent boots with flashing counterflashing and proper shingling. Drip edge metal valley flashing dormer chimney and kickout flashing are types of roof flashing that shed water away from the connections between roofs walls chimneys and other building assemblies.

The metal flashing is formed with a hook edge and cleated on 12 centers. You can see that i m letting it run past the end of the roof and past the ridge line. Even if the roof has been properly flashed against the sidewall this one hasn t water can still run down the side of the house and behind the siding causing rot. Flashing is installed to surround roof features such as vents chimneys and skylights.

The flashing extends up the wall at least 4.