Replies

1. 
   dthodal | May 19, 2003 05:53pm | #1

   Anything over 6-7" width in pine flooring, I would face fasten the flooring.

   walk good
1. 
   FastEddie1 | May 19, 2003 06:11pm | #2

   Are you saying the 3/4 ply is ok, but countersink screws through the pine?

   Do it right, or do it twice.

1. 
   ScottMatson | May 19, 2003 10:37pm | #3

   You can do it the way you mentioned, but you'll be able to use a regular angled nailer if you use treated 2x4's as sleepers. Do you know if there is a continuos plastic barrier under the slab?

1. 
   FastEddie1 | May 19, 2003 11:07pm | #4

   Probably is a 6-8 mil visqueen sheet, since that's the norm around here.  The problem with using 2x4's is the thickness.  The ceiling height is only 8 ft, so every inch counts.

   Do it right, or do it twice.

1. 
   ScottMatson | May 20, 2003 03:17am | #5

   Yep, I can relate. Maybe could use short nails? But a 2x4 would only cost you 3/4" in headroom, not bad for a better install, though it would obviously cost more. I don't know if this is a big advantage in your location, but you could get better insulation with the added thickness if you decided to insulate between the sleepers, maybe something like R9 or 10 I would think.

   Edited 5/19/2003 8:19:15 PM ET by Mad Dog

2. 
   dthodal | May 20, 2003 07:06am | #7

   If you use 2x for sleepers, I would keep my sleepers to 12" centers maximum unless you sheath the sleepers. Even with matched boards, I you will find some sponginess between your sleepers.walk good

2. 
   dthodal | May 20, 2003 07:02am | #6

   If I was installing the flooring over a joist floor, yes 3/4" plywood would be okay. By itself over a slab, one sheet will tend to move and cup creating a flooring nightmare. I am not a believer in adhesive, especially concrete to wood. Over time it does not hold up.

   I like two sheets of 3/4" cdx over a slab. It provides an excellent vapour barrier and provides adequate hold down whether you face nail screw or edge nail your flooring.

   Two sheets offset joints and screwed together provides an excellent subfloor for the flooring. Heigth is a problem, but usually only for door openings and possible adjacent floor levels.

   walk good