Having a new seperate shop built its 1200 sq ft , and a basic shell , I am reviewing the best options for flooring. I haven/t built a shop floor in 23 years.! My ideas so far , put in 2 by 4 sleepers on 24in centers over the concrete , insulate between the 2 bys with pink foam insulation, plastic vapor barrier over that , and HD has for $11 a black osb waterproof sheathing, to be put over the 2 by 4 /s. A local mo .sawmill has 6in by 8 ft, 210 pcs per bundle of 1 in mixed green hdwds for $200. for a finish floor. Thank you .and what have you used, and what would you do differently ?? The shop will be located in guthrie OK about 1 hr N of OKC

John can you elaborate on the interlocking cushioned squares , where to buy from ?? I have 12 major power tools and they weigh a lot , Hmmm might just let them sit on concrete as I do here in my garage . I do have quite a few rubber mats, Any other ideas ??? thanks for all the tips and things to think about ??

The interlocking mats I have are 1/2 inch thick, 2 ft X 2 ft.. I bought them several years ago and they are still holding up fine. I haven't seen any 3/4 inch thick mats. Harbor Freight has some for about 50 cents a square ft. (1/2 in. thick by 25" square) but it seems like you can find them almost anywhere.

Having a new seperate shop built its 1200 sq ft , and a basic shell , I am reviewing the best options for flooring. I haven/t built a shop floor in 23 years.! My ideas so far , put in 2 by 4 sleepers on 24in centers over the concrete , insulate between the 2 bys with pink foam insulation, plastic vapor barrier over that , and HD has for $11 a black osb waterproof sheathing, to be put over the 2 by 4 /s. A local mo .sawmill has 6in by 8 ft, 210 pcs per bundle of 1 in mixed green hdwds for $200. for a finish floor. Thank you .and what have you used, and what would you do differently ?? The shop will be located in guthrie OK about 1 hr N of OKC

The moisture movement in the basement is up through the concrete. 1000 ft2 of visually dry concrete can allow up to 18 gallons of water through it in a day. My company (mid-Atlantic) does this sort of thing - and when we do this in basements and crawlspaces, the condensation is alway on the bottom of the plastic whether the plastic is against gravel, dirt, or concrete. I have seen moisture on the bottom of plastic on an at-grade garage floor with sleepers many times.

For walls against concrete, we hang 6 mil plastic from the plate at the top, down the wall, and out the floor. We then build a stud wall with a 2X4 plate at the top, a pressure treated 2X4 plate at the bottom, and 2X3's for studs to save cost as there is no needed structure. The top and bottom plate is pushed against the wall, the plastic is trimmed off at the inner face of the bottom plate, and fiberglass batting is pushed back to contact the plastic on the wall (no contact, no insulation). Another way is to hang 2" thick styrofoam on the wall with taped joints, then a 2X3 wall inside that. With walls, the condensation always occurs on the outside.

Good luck

When are you expected to be up and running? I'm just east of you in Perkins.

I'm just south of you in Norman.

Here’s a different thought. You’re in the middle of farm and ranch country (I think). What I found are stall liner pads. About 4’x6’ 5/8” or 3/4” thick solid rubber (mostly recycled tires). They give the padding you need but will stand having heavy tools rolled across. Up here, they cost $60-70 US.