This brings us to the point that putting a rafter beside a wood truss or a truss beside a rafter on the same height of wall may not always work.
How to attache gable roof to gable end of house.
You have to do it thoroughly so that the rafters sit flush on it.
Continue to measure 2 x 4 s to allow nailing at each truss until you reach the end of your roof and add the additional 6 inches and 1 1 2 inches for that end.
If the stick framed rafter is a 2 6 it typically has just enough heel height after the birds mouth cut that a regular 2 4 truss can sit beside it and match height.
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Make a cutting on one of the sides of the horizontal roof beam on an angle.
I have attached a quick sample.
Then mount new trusses on the new addition walls.
When i left the house and deck floor height at zero the best i could get with this 6 12 roof on the house was a flat roof over the deck.
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.
Tying in to an existing gable roof.
Attach the horizontal beam by using a nail gun.
Butt the first new truss against the old one.
I raised the house ceilings to 120 and set the porch to 97 1 8.
Next cut out slots in rafters so a 2 x 4 will sit flush with it on the cap plate.
Fitting the shed in under the gable will also depend on the pitch of the house roof.