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Floor Inslulation

by LiveModern Webmaster last modified Jan 07, 2015 01:00 AM
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by last modified Jan 06, 2015

I have an building (new barn) that I want to install radiant heat under floor (between joist in basement). The cavity in constructed with 4" x 9" joist installed vertically, they are spaced 24" on center leaving a 20" x 9" cavity, and the floor is 1-3/4" T&G floor board which may have another layer of standard hardwood flooring installed on it in the near future. I am considering add 2" rigid foam board between the joist below the radiant heat tubes as well as 1/2" (or thicker) rigid foam board over the bottom of the joist, seamlessly covering the entire basement ceiling to ensure a good seal. My question is, would it be best to leave an air space between the 2" rigid foam board and the 1/2" foam board or have them sandwich together.




 

 

I have an building (new barn) that I want to install radiant heat under floor (between joist in basement). The cavity in constructed with 4" x 9" joist installed vertically, they are spaced 24" on center leaving a 20" x 9" cavity, and the floor is 1-3/4" T&G floor board which may have another layer of standard hardwood flooring installed on it in the near future. I am considering add 2" rigid foam board between the joist below the radiant heat tubes as well as 1/2" (or thicker) rigid foam board over the bottom of the joist, seamlessly covering the entire basement ceiling to ensure a good seal. My question is, would it be best to leave an air space between the 2" rigid foam board and the 1/2" foam board or have them sandwich together.

Sandwiched together - you may also consider using a foil backed foam for the piece inside the cavity to help redirect any radiant heat back up to the area being...


 

 

 
 
 
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