After the addition roof is framed and sheathed snap a line on the existing roof shingles 2 in.
How to tie in new roof to existing roof.
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.
Up from the valley center and cut through the shingles and underlayment.
The new flashing should go under the old felt and over the new felt and new roll roofing.
Tie a new roof to an existing gable differently.
Tie a new gable or hip roof to an existing gable or hip roof with valley rafters which perform the same function as ledgers.
Roofing nails to the existing structural sheathing.
The roof i.
The easiest way to tie in the new shingles with the old is with a cut valley see four ways to shingle a valley.
The big idea is that layers of the lower roof should sit below corresponding layers of the upper roof.
Install the 2x4 joists with some screws and brackets to the house edge.
Depends on the slope of the new roof.
The edge of the roof of the house and the frame to the porch should be seamless now.
To tie into the side of an existing roof put a new roof truss on the walls of the addition brace it upright then snap chalklines on the shingles to mark the center line of the new roof valleys where old and new roofs will connect.
Strip the roofing from the old roof at the connection point to.
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Now you have tied in the porch roof addition to the house.
The lower the slope the further it should extend.