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Old 08-31-2009, 09:55 PM   #1
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Adding shed addition to gable roof


Hi all,

I have a garage with a 4.5/12 pitch roof with 2x4 truss construction. I would like to extend the roof (at the same pitch) to make a shed addition on the side of the garage by about 6 feet. My question is how to join the rafters for the addition to the side of the garage.

The options I can think of are:

1) Cut off the tails of the trusses (which now make the 1 foot eave), put a 2x6 parallel to wall (perpendicular to the trusses, like a ledger board for rafters (not sure what it would be called)) and nail the new rafters into the 2x6. This will allow all the rafters to be in line with the top chord of the truss.

2) Sister new rafters onto the top chord of the truss - the rafters will be offset by 1.5" relative to the trusses.

What is the proper way to do this?

Thanks,

don

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Old 08-31-2009, 10:00 PM   #2
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Adding shed addition to gable roof


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Originally Posted by desch View Post
Hi all,

I have a garage with a 4.5/12 pitch roof with 2x4 truss construction. I would like to extend the roof (at the same pitch) to make a shed addition on the side of the garage by about 6 feet. My question is how to join the rafters for the addition to the side of the garage.

The options I can think of are:

1) Cut off the tails of the trusses (which now make the 1 foot eave), put a 2x6 parallel to wall (perpendicular to the trusses, like a ledger board for rafters (not sure what it would be called)) and nail the new rafters into the 2x6. This will allow all the rafters to be in line with the top chord of the truss.

2) Sister new rafters onto the top chord of the truss - the rafters will be offset by 1.5" relative to the trusses.

What is the proper way to do this?

Thanks,

don
Don,

The right way to do it is to run the new rafters along side the trusses and cut a birdsmouth on the rafters and sit it on the top plate. You outside wall at the 6' mark you know will roughly be about 27" shorter.

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Old 08-31-2009, 10:19 PM   #3
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Adding shed addition to gable roof


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Originally Posted by Joe Carola View Post
Don,

The right way to do it is to run the new rafters along side the trusses and cut a birdsmouth on the rafters and sit it on the top plate. You outside wall at the 6' mark you know will roughly be about 27" shorter.
Joe,

Wow - thanks for your quick reply! Sounds good!

don
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