How To Tie Existing Roof Shingles To Shingles

I e how big the last ones are i would recommend that you remove enough of the old shingles so that you don t leave the plywood seam the tar paper seam and the shingle seam all stacked on top of one another.

How to tie existing roof shingles to shingles.

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 it is time to use a cut valley in order to tie the new shingles in with the old roofing system. After framing and sheathing the new addition s roof snap a line over the existing roof shingles. 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.

After the addition roof is framed and sheathed snap a line on the existing roof shingles 2 in. Up from the valley center and cut through the shingles and underlayment. Other than that you would just follow the pattern that is already there. You want to be about two inches above the very center of the valley itself.