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ecocco1469 07-02-2013 05:22 PM

Bump out
How far can u bump out a room without having to add foundation.

joecaption 07-02-2013 05:33 PM

Depends on if you plan on redoing all the floor framing inside the main house.
Rule of thumb for every foot of bump out you need 2 feet if framing of the main house.

GBrackins 07-02-2013 07:17 PM

also would depend on what the bumped out wall is supporting, is it roof, 2nd floor, etc.

ecocco1469 07-03-2013 05:07 PM

I wanted to bump out the bedroom n it would hold up only the roof

hand drive 07-04-2013 09:28 AM

its always been three to one in my area... example- a 3' bump out would require 9' of joist into the room past the foundation back to a header in the floor. 4' would require 12' of joist and the joists have to have a special connection to prevent up lift from occurring ( upside down joist hangers connected to header etc...)

depending on room size a header might not be needed to be added into the floor just full room length joists that make it back to an interior wall or girder etc...

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