How To Roof Against A Wall

Proper roof wall abutment flashing examples.

How to roof against a wall.

Figure 1 roof plane butting against wall. There you have a z trim and an end wall flashing that have been joined using a stitch screw. Ideally i like to start by installing a 3 ft. 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.

In an existing construction you might have siding whether it be vinyl wood or brick. The proper installation of flashing at the point where the roof meets wall is to use metal step flashing. In this case we ve gone against new construction. For areas where the walls meet the roof you will need to use the step flashing technique.

Even though roof flashing is one of the most important elements of a roof not many people know how to install roof flashing against a wall properly. A roof or wall that is not properly sealed off from water can be extremely costly to fix not to mention the hassles that accompany the unwanted water. Metal flashing also called roof flashing goes against a stucco wall to protect it from water damage. Follow the photo for illustrated instructions.

Metal step flashings are pieces of metal that are shaped like an l at least 5 inches wide and tall and 8 inches long as shown in figure 2. Normally this wall would have a house wrap on it like tyvek. A corner flashing piece can either be bought from the hardware store or it can be made using a regular step flashing piece. 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.

The sheet acts as a backup at a vulnerable junction. Flashing is usually made of sheet metal and is used to seal and protect joints in a building like those where a roof meets the brick walls of a chimney from roof leaks by directing the flow of. Flat roof and flashing against brick wall install base flashing under shingles or over metal roofing material. Sheet of housewrap or even better a piece of self adhering roof underlayment to the wall before the first truss or roof rafter is placed against it.

If the roof runs flat up against the brick wall you must install the roof side of the flashing either under the last layer of shingles or over the roof material if it is metal. How to install roof flashing against a wall with a corner when there is a corner where the roof meets the wall you will need a corner flashing piece. Figure 2 step flashing. On lean to roofs where a sloping roof plane meets the siding endwall flashing is necessary to prevent leaks.