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Floor Joist fix.
Posted: Fri Dec 20, 2013 1:13 pm
by rockncountry101
My parents have a mobile home and underneath the home there is a floor joist that has a knot busted out of it. I was thinking the best fix would be to screw a new 2x6 right up against and into the existing 2x6. Would this be the best fix?
Re: Floor Joist fix.
Posted: Fri Dec 20, 2013 6:00 pm
by 1987Commodore
That should work fine. Some glue on the mating surfaces wouldn't hurt.
Re: Floor Joist fix.
Posted: Fri Dec 20, 2013 7:02 pm
by Greg
About the only better way short of replacing the joist would be sistering a 2x6 on BOTH sides, Glue & screw.
Greg
Re: Floor Joist fix.
Posted: Fri Dec 20, 2013 10:38 pm
by Greg S
A quality constructive adhesive is the key to sistering joists. In reality when the glue is dry the screws could be removed as they no longer serve any purpose.
Re: Floor Joist fix.
Posted: Wed Dec 25, 2013 4:59 pm
by ponch37300
Just to add to the good advice already posted. Screws don't provide good shear strength, meaning they will pull the boards together good but don't provide a lot of good up and down strength. Whereas a nail provides great shear strength but not a lot of strength to hold the boards together, nails will back out.
How big is this not? Unless it's 2" or bigger it really shouldn't be a problem. But if it is causing a problem then sistering another board is the best bet. Make it as long as you can. If you can fit a full 8 footer in there go for it. Use some construction adhesive like mentioned. Then either use bolts that will go all the way through and nuts on the other side with washers on each side. Or screw and nail it.