Underfloor heating underlay

Discussion in 'Plumbers' Talk' started by snipper1, Nov 22, 2006.

  1. snipper1

    snipper1 New Member

    Hi,
    Just installed Nuheat wet underfloor heating inside 50-65mm screed and layed laminated tiles on top. Works pretty well except the underlay is causing me some concern.
    1. The underlay is budget Topps tiles blue foam underlay with a low U-value and a possible Tog > 0.35? (unknown)

    My question being has the underlay got good enough conductance properties to transfer the heat from the screed efficiently and transfer to the laminate tile?

    and is there a proper underlay for this purpose?
     
  2. M.I.G.

    M.I.G. New Member

    > My question being has the underlay got good enough
    conductance properties to transfer the heat from the
    screed efficiently and transfer to the laminate
    tile?

    and is there a proper underlay for this purpose?



    either way it's abit late now innit..!?
     
  3. Dick Puller

    Dick Puller New Member

    0.35? (unknown)

    Tog???!!!!??....*** lol!!!! Never laughed so much since the wife died!!!!!
    Some hot shot salesman has got to have said that to you 'snipper'. Are you having a duvet day today then???!! lol
     
  4. Spyder

    Spyder New Member

    You appear to have got your ratings mixed up! Insulators should have a low U value to keep the heat in. Duvets should have a high tog rating to keep the heat in.

    You can have an insulator under laminate to stop the cold coming up but I don't think it makes any ene to put an insulator betwen the heater and the "wants to be heated". Did the label on the underlay say suitable for laying over underfloor heating?
     
  5. snipper1

    snipper1 New Member

    An extract from most underfloor heating specialists......

    Duralay Heatflow - Laminate has a low .35 Tog rating, which allow the warmth generated by underfloor heating to pass quickly into the room. Heatflow - Laminate conducts more heat than other underlays, making it the ideal choice for installations with underfloor heating, bringing greater heating efficiency and the potential of reducing heating bills.
     
  6. Jimbo

    Jimbo Screwfix Select

    Indeed, I think tog values are still widely used in the underlay market. Have a look at Cloud-9, for example.
     
  7. Cransewater

    Cransewater New Member

    Chaps,

    We use U value, others use R which is 1/U so the higher the R the better the insulation. A tog is 1/10th of some nominal R ,cant remember exactly if its 1 or what - you'd have to look that up. Its used on duvets to show how warm they are but could just as easily be applied to any insulation. It might actually be easier.

    Like wise any underlay for UFH beneath wood should have a very high U ie its very conductive which would give it a very low tog value.

    Hope this clarifies,

    Cranswater
     
  8. snipper1

    snipper1 New Member

    Thanks for that Cransewater at last an expert on the site worth taking notice of..

    Read this Dick-head sorry Dick-puller another website saying the same.... do your homework before replying next time.

    Duralay Heatflow – Laminate uses the new Thermylin™ process developed by Interfloor, a combination of additives and manufacturing technique allow the production of underlays with higher thermal conductivity and hence lower thermal resistance than normal, whilst retaining the essential qualities of underfoot comfort and protection. Prevents overstraining of joints in wood and laminate board. Creates a receptive surface, helping mask slight unevenness and minor blemishes found in the screed surface. High density resilient rubber underlay laid under wood and laminate flooring will keep noise to a minimum, making your environment a much more peaceful place to be. Quick & Easy to Install. Always ensure in fitting over concrete floors you use a DPM membrane between the subfloor and underlay as recommended by the wood/laminate manufacturer. Suitable for domestic & contract installations.

    Roll Size: 11m x 1.37m (15.07m2 per roll)
    Thickness: 3mm
    Tog Rating: 0.35 Tog
    Drum Sound Classification: SL 20 (57 Sone when tested with 7mm DPL Laminate Flooring)
     
  9. Spyder

    Spyder New Member

    You haven't got enough posts to come on here and critisise anybody. If you want free advice then you have to be prepared to get your leg pulled. If you want an advisor who doffs his cap and is respectful, engage an expert and pay him to kiss your ***. In your original posting you stated:

    1. The underlay is budget Topps tiles blue foam underlay with a low U-value and a possible Tog > 0.35? (unknown)


    I suspect that the original doccumentation said "Tog < 0.35" hence the comments about whether you know what you're talking about.

    Finally, if you put a list of all the "experts you're prepared to take notice off" then most of us can save our time.
     

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