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Discuss UFH pipe spacing in screed floor in the Central Heating Forum area at

  1. Matt88

    Matt88 New Member


    I am just looking for a little guidance in what my requirements should be for pipe spacing under the screed, my systems specs are as follows:

    15mm ultra flex polypipe
    poly pipe zru 2/3 manifold pump unit
    and plastic egg trays for pipe

    S&C screed @ 60/65mm thick, Schulter ditra and 10mm porcelain tile.

    If I use 100mm spacing Im guessing I can use lower flow temps? Would this be okay?

    The room is a kitchen 28m2 with around 23m2 of floor space.

    I'm not 100% on the spacing 100mm or 200mm or even 150mm.

    Any help and advice would be thankful.

    Sorry if this is in the wrong section.

  2. Riley

    Riley S. Mod Trusted Plumber GSR Top Contributor!!

    Not used Polypipe before but MIs are key. I’d call the manufacturer they will know their product best
  3. Matt88

    Matt88 New Member

    Okay thanks for that I'm going to contact polypipe for the requirements, also whats MI's ?
  4. Riley

    Riley S. Mod Trusted Plumber GSR Top Contributor!!

    Manufacturers instructions. Most brands will have their spec to enable even heat spread
  5. Matt88

    Matt88 New Member

    Ah I see. I've just emailed poly for a free design :)
  6. king of pipes

    king of pipes Trusted Plumber GSR

    This maybe of use to you Matt. Cheers kop

    Attached Files:

  7. SimonG

    SimonG Trusted Plumber

    All about heat requirements for room. That will dictate the spacing.
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  8. Matt88

    Matt88 New Member

    @Kop looks like he file pdf doesn't work count let me download for some reason, maybe because off my post count.

    @SimonG@SimonG are we talking about watts/BTU's needed to heat the room ?
  9. king of pipes

    king of pipes Trusted Plumber GSR

    You can download from Google bud

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