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.
Sealing endwall flashing to wall without siding.
Proper roof wall flashing example.
Before we install the end wall flashing we have to apply tape sealant to the top of the z trim so that there s a water tight barrier between the end wall flashing and the top of the z.
Likewise a 10 wide flashing will result in a 5 inch wide roof deck flange and a 5 inch vertical flange.
To install the roof wall flashing above the builder bent the top edge of the flashing into a 90 degree lip about 2 cm in width.
The part of the house that it is attached to is wood lap siding.
I had a contractor build a shed roof on the back side of my carport that extended over and attached to the house.
Metal roof flashing is a galvanized sheet metal that is bent at a 90 degree angle about 8 to 12 inches on each side of the angle.
It comes in 10 foot lengths or for step flashing 6 inch lengths.
Obviously the further up the wall a flashing extends the greater the resistance to water intrusion.
The final thing to do is install the end wall trim.
It is used to seal the gap between walls and intersecting roofs.
When he shingled the new roof he just used roofing caulk where the shingles meet the wall no flashing of any kind.
A common problem area is the point where a gutter dies into an adjoining wall as the photo below illustrates.
That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above.
A key part of my approach is using a special piece of flashing at this.
