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Replacing floor joists

Posted by Ray S on October 7th, 1998 11:02 AM
In reply to Replacing floor joist by Mark Drescher on October 5th, 1998 03:06 PM [Go to top of thread]

9 of 10 people found this post helpful

I would recommend using two 2x6's sandwiched
together with nails and a PL brand Construction
Adhesive. Also apply the adhesive to the top of
joist before you put it into place, this will help
adhere your subfloor to the tops of your new
joists (reducing squeeks, and overall bonding).
I would also place them on 12" centers, you may
need to shim your joist from the top of the
foundation wall to get contact with your subfloor.
This is not overkill if your concerned about the
finished product, when walking on the floor you
do not want any bounce. You will also want to put
a support wall down the middle to support the span
of your new joists. I would recommend a steel I
beam. You can usually pick up previously used I
beams from metal fabrication shops. Support the I
beam with posts, that go down to a concrete
foundation pad.
This is just a recommendation, most contractors
may call this "overkill", but if you want a finsihed
product you don't have to worry about, do it right
the first time.
You didn't mention if you were going to replace the
rim joist around the outside, if so, you could jack
up your entire house and replace with all new "larger"
floor system.
You won't be able to get all the information you
need from here. Contact a contractor and discuss
your plans, and ask his advice. Most will give you
advice at no charge. Make sure you get in contact
with your city building codes, they may put a whole
new set of rules out that you must go by.

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