On the other hand you ll find some siding parts need to be nailed down under the roof shingles.
Roof flashing to vinyl siding.
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.
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.
On lean to roofs where a sloping roof plane meets the siding endwall flashing is necessary to prevent leaks.
It is always recommended to install step flashing behind stucco dryvit wood panel lap siding vinyl siding cedar shingle siding etc.
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.
Install undersill trim along the edge of the vinyl over the flashing at the top and bottom.
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.
Now install the kickout flashing and step flashings up the roof as needed.
This is your fail safe backup to any leak at the kickout wing.
Then tack the ledger into place with 16d nails.
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.
Failing to replace step flashings when a cedar shake roof is replaced with a composition shingle roof.
Flashing is a strip of metal usually aluminum about 8 inches long and bent at 90 degrees with each side at least 5 inches wide.
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.
In this sense it seems more practical to install the siding first.
Some roofing components such as the flashing are easier to install without the siding.
Otherwise the siding installer will need to be extra cautious with the new roof.
The intersection between a roof and a sidewall can be a rot problem waiting to happen.
Step flashings on a cedar shake roof are typically installed every 10 inches.
To tie the roof into the siding the tin roofing panels must first be installed to.
Then caulk the nail heads.
