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Bpawb 07-08-2008 05:50 AM

Nail and Glue?
Have 5" wide x 3/4" thick T&G solid pine flooring....I am considering both Glue and nails

Nails will be applied--1 at every joist...and--1 inbetween every joist

I was thinking PL polyurethane or subfloor adhesive, Applying -- 1 bead approx. 1/4" thick down the center and the full length of each board.

It is a conditioned crawlspace below ... so no worries about moisture coming from below.

Any advice or alternates on this plan?


Termite 07-08-2008 08:11 AM

T&G flooring should not be glued. It should be nailed only. The reason for this is that the wood needs to be able to expand and contract, and movement is facilitated by the tongues and grooves.

The expansion and contraction has to do with the humidity inside your house (dry in winter, more humid in summer, AC, furnace, etc). The wood will always absorb and expel moisure from indoor air.

Along the same lines, don't forget to leave a little expansion room at the edge of the floor under the base shoe and base board.

26yrsinflooring 07-09-2008 08:02 PM

I concur no glue!

JazMan 07-09-2008 11:07 PM

I disagree. You should check with the manufacturer of your flooring, but most wood flooring that is 5" and wider must also be glued. The no glue applies to narrower boards.


26yrsinflooring 07-09-2008 11:21 PM

Not pine, man it will cup like forty year old school house.
If it was any thing else you float it with glue..
Pine will absorb the moisture right out of the glue and cup the top of the groove.
It will also impede expansion if the floor is glued to the substrate.

5" pine or any pine is not really a good idea for a floor, to soft.

Just my opinion.

JazMan 07-10-2008 03:40 PM

Preventing cupping is the reason some manufacturers insist you must also glue any wood flooring 5" wide and wider. Again, consult the manufacturer's instructions to a tee.

BTW, gluing wood floors does not prevent it from moving, wood glues are rubbery and so everything gives and comes back.

I agree pine floors are not very durable, but many people want them for their rustic look.


26yrsinflooring 07-10-2008 08:31 PM

I have done some research on this issue since it came to post.

It seems there a few people that have used the glue and been very succesful with it. There are some others that saw cupping but not very bad.I have glued engineered Pine T&G but never a solid

My first instinct as flooring pro is accept a method as explained by the book then look for the best way to acheive the same goal.

Perhaps it will work well.

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