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I laid about 200 sq ft laminate, I didn't do too bad of a job but I missed 2 spots, away from each other but still pretty center in the room, where the boards just won't lock. I tap from both ends I hammer down flat on the joint, I air dusted it, I checked that the won't stay together.

If I try to replace the boards around the failed joint I'll have to lift up ~75% of the entire room. This seems really risky I know a lot of these boards are going to get damaged in the process, I would really like to avoid having to spend anymore money. can I safely use a small bit of glue at these two junctions? Or is there a better way?

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    Does tapping from the end close the gap temporarily? If not, I don't see how glue is going to help. – Doresoom Feb 27 '15 at 23:12
  • @Doresoom it will close it just will open up if you step on it or start rapping other boards. If I glued it I could lock it tight temporarily with some tape. ?????? Bad idea???? – rhill45 Feb 27 '15 at 23:35
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I don't see gluing the joint being a problem as long as there is nothing trying to push the joint apart, other than a small deflection of the floor while stepping on it. The subfloor itself is supposed to be pretty flat, say no more than a 1/16" dip in the floor with a 4' straightedge. That was the requirements with my floor. Yours may be different. It should be somewhere on the packaging.

Other factors could cause it to separate, for example, and perhaps it really the only thing, is that the interlock that hold the pieces together failed either before or after assembly. If the high part of the interlock gets knocked off, there will be nothing to hold it together. If that is the case, and the missing parts aren't lodged someplace that forces the mating parts apart again, and there is not a place where the flooring drops excessively when it is stepped on, then by all means glue it and forget it.

If the joint has trash hidden under or in it, the glue will be hard pressed to hold it all together. It will fail with movement, the core material of most laminate flooring is not made to handle a lot of movement, let alone glue trying to hold it together as well.

  • Ok I gonna try it. This is what I love about SE. Good information in this answer, thank you! – rhill45 Feb 28 '15 at 2:27
  • Expect it to make a mess, be ready with a dampened, not soaked, cloth to wipe up the excess if you use a water based glue. If you use a polyurethane based glue, have paint thinner ready. Again, expect a mess. If you don't make a mess, then you do not have enough glue. Good luck. – Jack Feb 28 '15 at 4:33

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