How To Roof Against A Wall

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.

How to roof against a wall.

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. Follow the photo for illustrated instructions. 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. In an existing construction you might have siding whether it be vinyl wood or brick.

Metal flashing also called roof flashing goes against a stucco wall to protect it from water damage. Figure 2 step flashing. A corner flashing piece can either be bought from the hardware store or it can be made using a regular step flashing piece. 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.

There you have a z trim and an end wall flashing that have been joined using a stitch screw. 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. 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.

Normally this wall would have a house wrap on it like tyvek. Figure 1 roof plane butting against wall. On lean to roofs where a sloping roof plane meets the siding endwall flashing is necessary to prevent leaks. 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.

Ideally i like to start by installing a 3 ft. 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. Housewrap creates the foundation. 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.

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. Flat roof and flashing against brick wall install base flashing under shingles or over metal roofing material. Proper roof wall abutment flashing examples. For areas where the walls meet the roof you will need to use the step flashing technique.