The intersection between a roof and a sidewall can be a rot problem waiting to happen.
Roof flashing to vinyl siding.
On a wall to be covered with wood cement board vinyl or metal.
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.
To tie the roof into the siding the tin roofing panels must first be installed to.
Fit the flashing in place caulk the top edge and nail it with galvanized nails long enough to penetrate at least 1 inch into the structural members.
Nail j channel along both sides of the cutout.
Next slide drip flashing behind the vinyl so the lip fits over the top of the ledger as shown at right.
In this sense it seems more practical to install the siding first.
This is your fail safe backup to any leak at the kickout wing.
Now install the kickout flashing and step flashings up the roof as needed.
On the other hand you ll find some siding parts need to be nailed down under the roof shingles.
Then tack the ledger into place with 16d nails.
On lean to roofs where a sloping roof plane meets the siding endwall flashing is necessary to prevent leaks.
When the vinyl siding rests on top of these boards a piece of flashing is needed to create a leak proof conversion between the first piece of vinyl siding and the horizontal fascia board.
Otherwise the siding installer will need to be extra cautious with the new roof.
Install undersill trim along the edge of the vinyl over the flashing at the top and bottom.
If the house is sided with shingles or lap siding simply slip the metal s top edge up under the bottom edge of the shingles or siding as far as possible.
Then caulk the nail heads.
In your case with the vinyl siding your exterior trim work has horizontal fascia boards at the bottom of the house and each story line.
Any water that may pass through the small hole where the siding is trimmed around the wing will be drained back out onto the face of the siding.
It is always recommended to install step flashing behind stucco dryvit wood panel lap siding vinyl siding cedar shingle siding etc.
Failing to replace step flashings when a cedar shake roof is replaced with a composition shingle roof.
