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Best Practice: How much insulation to go in new base for UFH

Discussion in 'Building' started by Udhi, 23 Feb 2009.

  1. Udhi

    Udhi

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    Hi all,
    I have just spoken to a plumber who can install Wet Under Floor Heating for a 15SQM conservatory. He is going to use a POLYPIPE brand system.

    The base is yet to go down. I would like to make all the right choices from the off. First is how much and what make of underfloor insulation should I request? I was planning on 70mm KINGSPAN until someone told me you could go as much as 300mm??! Then someone else mentioned CELOTEX Fast-R FF3000.

    Any advice on what to specify, really appreciated.

    The tiles will be Travertine or Sandstone, if that makes a difference. I will come back asking about the best bedding and tiling compounds later.


    Regards
     
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  3. ^woody^

    ^woody^

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    70mm kingspan/celotex is the minimum. I don't know what real benefits there will be with more than 100mm though
     
  4. Udhi

    Udhi

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    Location:
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    Yup, I was recommended 70mm as a minimum. Another site has been quite forthcoming. The recommendation in there is for about 150mm over which we have diminishing returns.....

    I need to go have a yack with with the conservatory bods - renegotiate and what have you...

    U
     
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    DIYnot Local

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