On a wall to be covered with wood cement board vinyl or metal siding the step flashing and associated roofing must be installed first so the siding can cover the top of the step flashing on.
Roof to wall siding flashing.
Open valleys have metal flashing to protect this critical area of the roof.
I made this video this morning and i hope it help explain the flashing wall detail where the siding meets the roof.
Proper roof wall flashing example.
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.
While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately.
Likewise a 10 wide flashing will result in a 5 inch wide roof deck flange and a 5 inch vertical flange.
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.
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.
There have always been problems with the flashing details at head walls rake walls and chimneys especially if stucco brick or stone veneer is used.
A 5 inch wide flashing will result in a 2 1 2 roof deck flange and 2 1 2 vertical wall flange.
Roof to wall flashing.
Must be kept up off the surface of the roof a minimum 1 some manufacturers of exterior wall coverings require.
The edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak.
Obviously the further up the wall a flashing extends the greater the resistance to water intrusion.
The exterior of a house presents plenty of opportunity for leaks.
If siding on the house wall abuts the porch roof joint the lowest strip should be removed to install the flashing underneath.
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.
23 roof to wall and deck to wall flashing home builder s guide to coastal construction page 3 of 3 figure 3 deck ledger flashing.
Technical fact sheet no.
Step 2 measure the length of the porch roof joint to determine how much flashing you will need.
A common problem area is the point where a gutter dies into an adjoining wall as the photo below illustrates.
