10:25AM | 08/16/01
Member Since: 08/15/01
2 lifetime posts
I would like to use plywood on cement for my wood floor. I will put a design on the sheet of plywood before I put it down. I need to know the best way to fasten it down and what thickness to use. I am open to any suggestions, Thanks!


05:12AM | 08/17/01
Member Since: 03/13/00
1675 lifetime posts
I think I would want to use pressure treated plywood to prevent rot and termites. It might be difficult to find in a quality that looks good enough for a floor though. Also, that "green" look might not be what you want.
Just thinking...


11:51PM | 08/17/01
Member Since: 11/14/00
333 lifetime posts
I think he meant to use the plywood as a subfloor on top of which he would nail the wood floor, not as the wood floor, itself. :-)

You can either (1) glue it down with liquid nails or mastik, or (2) screw it down with concrete screws, or (3) nail it down with a special air hammer.

Nailing with the air hammer is the best way. The air hammer is very much like a gun, with .22 caliber bullet-sized charges that literally shoot the nails into the concrete through the plywood. Usually, I prefer screws over nails, especially to provide support in the in-out direction as here, but concrete is fickle to screw into and the nail gun does a fine job. You can buy one for about $60-$90 or rent one at any tool rental place.

If you plan to nail a wood floor on top of the plywood, you will need at least 3/4 inch thick plywood. If not, then any thickness will do because you do not need the wood to actually hold weight up as you would if you did not have the concrete floor and instead had joists.

Use pressure treated plywood that has tonues-and-grooves, which are made for use as subflooring and are not green like pressure-treated outdoor deck wood is.

[This message has been edited by Lawrence (edited August 18, 2001).]


09:50AM | 08/20/01
Member Since: 03/13/00
1675 lifetime posts
I dunno, Lawrence. Why put "a design on the sheet of plywood" if it's to be a subfloor? It sounded to me as if that would be the floor.
OK Southerb. Which is it?


05:53PM | 08/20/01
Member Since: 08/15/01
2 lifetime posts
The sheet of plywood is what I call the poor mans wood floor. I intend to use the sheet of plywood for the wood floor. It is not intended for a subfloor. Thanks to everyone who has replied to my post!
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