Carpeting over concrete
It's called Enviro-Cushion. Made in Mexico, Fairway Tile & Carpet in Clawson Mi is/was (?) the only place you could buy it in the USA. Not sure if it's still the case. Last time I checked it was about $1 per sq. ft., probably more now. Can ship anywhere.
For concrete floors (100% Waterproof, No Chlorofluocarbons, 4.5 R factor, 100% Non Alergenic, 3/8" thick, 15 lb. Density Feel).
I've shipped a few dozen rolls, several years ago.
Tile 4 You LLC Troy, MI
KERDI Shower Specialist ... DITRA Installs ... Product-Method suitability consultation. I have NEVER made a mistake, I thought I did once...........but I was wrong! - PRODUCTS ADVERTISED WITHIN MY POST ARE NOT ENDORSED BY ME!