The pitch is 1 9 16 in 12.
How to attache gable roof to gable end of house.
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.
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.
Nail it near the peak of the trusses.
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After that to make it flush with the roof of the existing house cut the two outer rafters.
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.
I raised the house ceilings to 120 and set the porch to 97 1 8.
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.
Tying in to an existing gable roof.
Butt the first new truss against the old one.
I have attached a quick sample.
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.
Fitting the shed in under the gable will also depend on the pitch of the house roof.
You have to do it thoroughly so that the rafters sit flush on it.
Next cut out slots in rafters so a 2 x 4 will sit flush with it on the cap plate.