Where the porch roof extended over the shed roof we installed a 2x6 ridge that ran from the top of the dropped structural ridge to the apex of the sleepers.
How to tie into a hip roof.
Up from the valley center and cut through the shingles and underlayment.
After that to make it flush with the roof of the existing house cut the two outer rafters.
The new roof will need to be cut to the right angle so that it fits snugly against the roof.
Remove the shingles and roof sheathing from the area where the new roof will tie in using a shingle stripper pry bar and reciprocal saw to expose the existing roof rafters.
Attach 4 6 centering rafters and lift the ridge beam into place.
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 roofing cement will resist possible leaks overnight.
To scribe the angle we placed a length of stock on top of the rafter peaks and leveled it across using a scrap block to trace the angle.
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The first step in the process of erecting the hip roof is to get the ridge beam into place at the top of the roof.
Now you can begin assembling the outer rafters and attaching the rafter beam to the edge of the roof of the house.
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Attach the horizontal beam by using a nail gun.
The new roof now needs to be connected by nailing through the board into the joists.
Place the 4 6 common rafters in their designated positions along the 2 longest walls and nail them firmly to the wall with a nail gun.
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This is important to minimize the chance of any water being able to penetrate the gap.
After the addition roof is framed and sheathed snap a line on the existing roof shingles 2 in.
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