Electric radiant floor heat. I need to encase this wire in a lightweight mix to distribute the heat evenly. They suggest a light weight gypcrete mix. I read a few facts and it looks very well suited for the hydroic radiant heat systems. I have used this wire system before in thinset & tile with no problems. This surface will be covered in a floating wood laminate. Only 150 sq ft, ½ inch thick. I was thinking of using a cement sand mix instead of gypcrete. Should I use any additives with it? Oh yeah, it will be going over an uninstalled concrete slab. They suggest using reflectix (bubble foil wrap between the mix and slab. Anyone done this before??
Thanks TP