Flashing Roof To Sidewall

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.

Flashing roof to sidewall.

Continuous flashing has always been used at a headwall an intersecting wall at the top of a roof plane and perpendicular to the slope. Butyl tape should be applied where the foot of the flashing attaches to the roof. This is the sidewall flashing from american building components. The horizontal part of the flashing will vary depending on the type of roof covering material.

Even if one piece of step flashing fails the flashing and shingle below it start the. The flashing shall be a minimum of 4 inches 102 mm high and 4 inches 102 mm wide. It s a standard l trim and we use this trim most often in a concealed or hidden fastener application. At the end of the vertical sidewall the step flashing shall be turned out in a manner that directs water away from the wall and onto the roof and or gutter.

Apply drip edge and roof underlayment over the roof deck and continue lapping up the sidewall and over the water resistive barrier in this case rigid foam insulation a minimum of 7 inches figure 2. Except where walls are brick the vertical part of the sidewall flashing should extend up behind the exterior wall covering just like with headwalls. 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. How to install sidewall flashing and kick out diverters on homes with rigid foam insulation sheathing.

Here s how to install it correctly. Sidewall flashing is applied when the side of the roof butts up against an adjacent wall. Vent flashing done right to prevent leaks back up roof vent boots with flashing counterflashing and proper shingling. Flashing against a vertical sidewall shall be by the step flashing method.

In the 2012 irc the section that covered sidewall flashing was much expanded and for the first time it included continuous flashing as an approved method for roof to sidewall flashing with asphalt shingles. Proper roof wall abutment flashing examples. A sidewall is a junction between a wall and a sloped portion of a roof. Installing the sidewall flashing.

Now we can put our sidewall trim up make our marks for cutting and folding and install it. The wall side of the flashing can either be covered over with siding or sealed with caulk. Installing step flashing to prevent roof leaks step flashing spans the joint between roof shingles and an adjacent side wall. Step flashing redirects the water back onto the shingle.