CZRG-SH5MM-24X48 reviewed by Andrea B. of Brattleboro, VT

Works surprisingly well

I'll admit, when this arrived I was doubtful that it would do anything - it's pretty thin. But halfway through the CeraZorb underlayment installation on the basement floor, we could feel it working - definitely blocked the chill coming through the concrete! I'm certain this will keep the radiant floor heating in the room where it belongs, and not seeping down into the concrete below.

CeraZorb® Insulating Synthetic Cork Underlayment (2’ x 4’) - 1 Sheet