Insulation Under Radiant?

Kengineer

Hi, guys. I am a radiant heat component supplier, and I am trying to get a better insight on how these products are actually installed.

Specifically, I am looking at installing under non-tile surfaces. Hardwood, laminate, vinyl.

In Europe they are using a 1/4" thick Extruded Polystyrene (rigid sheets) called Depron when installing under laminate or vinyl. There also seems to be a softer roll-out material used by some installers. I haven't seen anything like that in my search in the U.S. I can find Polystyrene, but only 1" thick or more. Is the material around, and I haven't found it? Or do U.S. installers use a different insulation under radiant? Or do U.S. installers skip insulating under the radiant, and instead trust the fiberglass batts under the sub-floor in the joist space?

dakzaag

Welcome to CT, Newbie here, but maybe some one can answer.

Sounds like fan fold to me or something like that, I'v seen it in 4 foot widths folded 2' wide total length is something like 20' easy to cut down to a size that fits.(like between joists)

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