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RH in Concrete for Wood Floor with Vapor Membrane
08-22-2012, 10:50 AM, (This post was last modified: 08-22-2012, 11:10 AM by Ernesto.)
RE: RH in Concrete for Wood Floor with Vapor Membrane
I've done solid over concrete in different ways. One was below grade, Bostik MVP4, six mil plastic, floating plywood floor, 15lb felt then nailed down 3/4 Beech, a very unstable solid. The home had a very magnificent HVAC system so you could set it to high and low temps with humidification. The pad was cut into the side of the mountain, multiple levels below grade. Water was seeping out of the granite rock at the bottom of the house. No problemo so far and that was 2 years ago. knock on wood.

Other solids can easily be glued to concrete with high grade adhesives. Lots of shorts have always been glued direct to concrete but no below grade.

Larger/longer wood needs to be milled perfectly in order to get a tight fit when gluing direct. You can cull out quite a few square feet of wood if they are not milled perfectly and high grade mature hardwoods. There are several quality hardwoods that allow you to glue direct but your going to be paying up around $20 a sf, especially for the really wide stuff milled out of old growth lumber.

Theres a guy up in Minnesota that swears he can do almost any solid over radiant heat and he is very well established hardwood guy. I'm just glad we don't go there down here in the Old Pueblo.
Stephen Perrera dba
Top Floor Installation Co.
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RE: RH in Concrete for Wood Floor with Vapor Membrane - Ernesto - 08-22-2012, 10:50 AM