Roof To Wall Flashing Wood Siding

However the vast majority of water problems in walls are caused by water leakage from the exterior not by poor vapor barriers.

Roof to wall flashing wood siding.

I had a contractor build a shed roof on the back side of my carport that extended over and attached to the house. Properly installed wall flashing is critical to your building s health. Stop wood sidings at least 1 inch short of the bottom leg at step flashings and other roof flashings. A key part of my approach is using a special piece of flashing at this.

I m afraid that with time that rain is going to find its way between the roof and the wall and. Often with new construction the roof flashing is first nailed to the wall. 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. I made this video this morning and i hope it help explain the flashing wall detail where the siding meets the roof.

Obviously the further up the wall a flashing extends the greater the resistance to water intrusion. There sometimes is a problem with movement differences of the wall and the roof decking when the flashing is fastened to both the wall and the roof. The exterior of a house presents plenty of opportunity for leaks. Click to enlarge any image otherwise water will wick up into the flashing leading to paint failures and decay see figure 1 6 above left.

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. The solution to rotting sidewalls is a small piece of bent metal called a kickout flashing at roofing suppliers which simply directs all that water away from the wall. Likewise a 10 wide flashing will result in a 5 inch wide roof deck flange and a 5 inch vertical flange. A 5 inch wide flashing will result in a 2 1 2 roof deck flange and 2 1 2 vertical wall flange.

Even if the roof has been properly flashed against the sidewall this one hasn t water can still run down the side of the house and behind the siding causing rot. When he shingled the new roof he just used roofing caulk where the shingles meet the wall no flashing of any kind. Deck joist ledger spacer behind ledger housewrap or building paper housewrap or building paper exterior sheathing flashing drip edge z flashing 2 z flashing 1 deck board siding gap. 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.

The part of the house that it is attached to is wood lap siding. Then the house wrap and exterior wall covering are installed over this roof flashing. Siding details at roof wall joint step flashings to avoid rot. Technical fact sheet no.