OK I have concrete, on grade. Covered with old asphaltic mastic and its not perfectly level. So a glue down could be a PITA, as the old mastic needs removing before the floor can be leveled. And besides, I don't like the rock solid feel of a glued down floor. So glued down is out.

But I don't like typical floated floors either. And besides, they need the floor to be VERY level. And the leveler products tell me to strip off the old mastic first. So floated are mostly out.

So I thought about nailing down a subfloor. But I have read horror stories about nails failing and the floor developing pops. 3000 tapcon screws sound a little onerous.

So thought about a floating subfloor. The best designs are two layers of overlapping 1/2" ply wood, screwed and glued together. That sounds effective, though good plywood isn't cheap these days and its a lot of screwing and glueing.

I stumbled onto the above mentioned product -- costs $1.50 sq ft. A little more $$ than plywood. But no screws/glue. I looked at it at a Lumberliquidator outlet. It looks good. Little "feet" on the underneath side. It will conform to the lay of the floor, and let me get by with a little more iregularities in the concrete as well, I think.

Anyone have expereince here?

http://www.subflor.com/ADVANCE/home.asp

Thanks in advance.....

No experience as it is new. However, it does look good and promising. I will certainly consider it on my next solid over concrete job.

I've used cleat feet on a floating subfloor before.

All the floaters I have done, I used ¾" cut into 2x8 panels, and stagger them, running the opposite direction of the flooring. This keeps from having a row on a long plywood seam.

I used them before .. the home owner bought them from Home Depo ..
we installed 150 yds of Carpet on them , i was a little concerned about power streaching on them but they worked fine .. there was a couple of high spots in the concrete , and it showed in the floor though ..