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wrldruler 08-24-2008 06:20 PM

Sistering 2x4's on Frame
Follow-up question on my garage conversion project.

I am converting my garage into a family room. Existing garage has a 2x4 frame. Existing foundation sticks out several inches further than existing frame. Wife doesn't want a shelf or ledge on a particular side. She wants the drywall to run continuous floor to ceiling.

To make up this distance between the existing frame and the foundation, I I want to "sister" a 2x4 onto the existing 2x4 stud, thus making a 2x8.

What is the correct method for "sistering" 2x4's together like this? How would I nail them together?

If I sister a 2x6 next to the existing 2x4 frame (nailing into the 2" overlap), then won't my 16"OC be messed up?



Wildie 08-24-2008 09:10 PM

It would be possible to screw the new 2X4's to the existing studs.
i would countersink the screws about an inch and use a 3 1/2" screw.
Run a bead of construction adhesive down the stud before screwing in place.

Big Bob 08-24-2008 11:00 PM

Try this.... Honey bun.. it will cost us an additional $ 89 for stud furring.. and another $ 75 for proper insulation. And another Saturday that I could spend with you and the kids...

or we can leave it up and not worry about high water damage.
besides I'd rather buy you a sexy new dress and take you out on the town.

Female logic...( always .... what's in it for me).

keep your friends close and your enemies closer...

buletbob 08-25-2008 05:59 AM

its a shame to loose that much room, but the wife always Win's in the end. What I we do is make up another wall with top and bottom plates tight against the outside wall. the top plate will fasten to the ceiling beams of installed blocking, the bottom plate will have to be fastened to the foundation, tapcons or some sort. and the studs right behind the existing. the studs will be fastened to the top and bottom plates ,and the middle you could cut some 1/2" plywood and screw or nail it to the sides of the studs to keep the from crowning out. you could even use construction addhesvie. BOB

daxinarian 08-25-2008 08:47 AM

if you offset the 2x4s so the new ones don't touch the old ones, your wall will be much more sound proof and have better thermal insulating properties. As to the 16" OC, start from the other end, I am assuming the last studs weren't 16" OC (if they are, just lose the 16" OC on both ends). If you make "2x8"s you create a path for heat/sound to travel through the studs. If you offset them, heat/sound doesn't have a direct path through the wood.

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