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What low-r value and thin tile decoupling products do you recommend over radiant pour?

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rossn
rossn Member Posts: 88
in Radiant Heating
What low-r value and thin tile decoupling membranes/products do you recommend over hydronic radiant that is within a concrete over pour? The thinner the better, and fully moisture tolerant is desired.

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  • PC7060
    PC7060 Member Posts: 1,681
    edited May 2022
    Schluter Ditra - 1/8”
  • rossn
    rossn Member Posts: 88
    Thanks! I will see if I can locate some sort of R-value on it, but agree it should be low.
    PC7060
  • ScottSecor
    ScottSecor Member Posts: 995
    We had porcelain tile installed about six years ago in our  new addition.  I installed the radiant tubing in the slab and was concerned the Schluter Ditra would negatively effect the heat output.   Honestly,  I doubt it reduces the output enough to notice.   Radiant performs fantastic.  By the way,  decoupling was considered cutting edge here in NJ  at the time.

    PC7060
  • PC7060
    PC7060 Member Posts: 1,681
    edited May 2022
    R value should be practically nothing given the majority of the Ditra surface area are voids filled with thinset.  

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