[Greenbuilding] Radiant Floor under wood

[Clarke Olsen]

  Concrete is a much better conductor than sand. You could pour concrete  
over
  your tubing and screed it off at or below the top of your sleepers.  
You don't need
  to fill the 9", just encapsulate the tubing.
  Clarke Olsen

On Aug 21, 2006, at 4:58 PM, josephbecker at riseup.net wrote:
> I am looking for some science and guidance on what to do with the  
> spaces
> between sleepers and tubing on top of a sub floor and beneath the  
> finish
> floor of vertical grain red oak.
>
> Our plan is to put 3" sleepers every 12" leaving 9" spaces. Our  
> flooring
> man suggested filling the voids with sand instead of leaving air in  
> order
> to prevent a hollow sound. The owner does not mind a hollow sound
>
> Would sand help spread the heat or inhibit the spread and trap the  
> heat?
> Best Energy,
> Joseph Becker
>
>
>
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