Sidewall Flashing At Roof Lines

The exterior of a house presents plenty of opportunity for leaks.

Sidewall flashing at roof lines.

Continuous flashing against a sidewall is one way to install a roof but it s not the correct way. The intersection between a roof and a sidewall can be a rot problem waiting to happen. Unless you re careful step flashing can allow water from the roof to slip behind the gutter and get behind the siding and even the housewrap. While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately.

Universal sidewall trim is designed to flash from your metal roof panels to a vertical wall such as a chimney. You can see that i m letting it run past the end of the roof and past the ridge line. The universal sidewall trim combined with sealant provides a watertight seal for your roof system. The universal sidewall trim combined with sealant provides a watertight seal for your roof system.

Proper roof wall abutment flashing examples. The flat roofing material must go up the wall a minimum of 12 or up the wall and over the top of the wall if the wall is less than 12 high. Open valleys have metal flashing to protect this critical area of the roof. 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.

But it doesn t work that way. Once even a small section of roofing cement fails you ll have a leak. The horizontal part of the flashing will vary depending on the type of roof covering material. A common problem area is the point where a gutter dies into an adjoining wall as the photo below illustrates.

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. Another term for this is a step flashing. Striations and bends on the flashing provide strength and match the lines of your other edge trims.

Striations and bends on the flashing provide strength and match the lines of your other edge trims. It s kind of like a step so water hits it comes off and moves off the roof. It may seem as if a single piece of flashing would offer more protection than many pieces of step flashing. Below are two photographs of roof wall step flashing completed and effective of a slate roof against a brick wall below left and in process with step flashing against a dormer sidewall before the dormer siding has been put in place below right.

Universal sidewall trim is designed to flash from your metal roof panels to a vertical wall such as a chimney. Here is an attempt though maybe not a very good one to make the roof flashing serve also as a through the wall flashing with a tile roof. A key part of my approach is using a special piece of flashing at this.