When a shed roof ties into an existing roof the new roof could be a simple lean to that covers a deck or porch or it could be the shed roof of a substantial addition.
How roof is tied with existing roof.
Tying in to an existing gable roof.
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Install the valley board.
Remove siding from the house where the new roof will attach to expose rafters or other framing of the old roof.
Attach the horizontal beam by using a nail gun.
Up from the valley center and cut through the shingles and underlayment.
Building the new roof.
After the addition roof is framed and sheathed snap a line on the existing roof shingles 2 in.
The easiest way to tie in the new shingles with the old is with a cut valley see four ways to shingle a valley.
Now you can begin assembling the outer rafters and attaching the rafter beam to the edge of the roof of the house.
In this video we show you how to tie in an existing roof with a new roof to avoid any future leaks or issues putting you back where you started.
The roof i.
The next step in the process is to install a valley board over the old shingles.
The very first step is to set up the trusses or rafters of the addition s walls so that.
Then mount new trusses on the new addition walls.
Butt the first new truss against the old one.
How to tie into existing roof shingles step 1.
The edge of the roof of the house and the frame to the porch should be seamless now.
Tie into the end of an existing gable roof by removing existing facing boards wall siding and any other obstructions back to the first truss of the old roof.
Install the 2x4 joists with some screws and brackets to the house edge.
Now you are ready for the installation of the roof and the shingles that you can pick out your local home improvement store.
Now you have tied in the porch roof addition to the house.