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  2. Underfloor Heating by uHeat

Discuss Correct build-up of subfloor for UFH + engineered herringbone planks? in the Underfloor Heating Forum area at TilersForums.co.uk.

  1. Ben R

    Ben R Active Member

    Hi all :handwaving:

    I realise this is a tiling forum, but I'm guessing some of you lay wood too ;)

    Does this look right? Joists > 18mm/25mm ply > 6mm UFH insulation boards > electric UFH > SLC > engineered herringbone planks.

    Also, is there any requirement to stick the herringbone down, or can I just float it?
     
  2. Tommcd

    Tommcd Active Member

    Location:
    Corby
    Can’t really float herringbone. I’d stick it down with F.ball B95
     
    • Like Like x 1
  3. Ben R

    Ben R Active Member

    Thanks for the product recommendation, I’ll check it out :thumbsup:

    Can I ask, what’s the reason herringbone can’t be floated?
     
    Last edited: Dec 7, 2017
  4. Tommcd

    Tommcd Active Member

    Location:
    Corby
    If it’s normal tongue and groove you’ll never get the planks to stay in place. It’s difficult to get the first row to stay in place even with glue. I’m actually fitting herringbone as we speak, pic taken a few moments ago...

    083183A8-0B64-4237-930E-7ED210835952.jpeg
     
    • Like Like x 1
  5. Ben R

    Ben R Active Member

    Ah, I see, so the nature of having the boards at right angles to each other causes them to open up more than they normally would-? Presumably you still run PVA down the grooves, as well as using F.ball B95 to stick them down?

    Looks doable, but I guess if the wife goes for the click/lock type planks, I could still float it?

    You’ve made a nice start with that floor by the way :sunglasses:
     
  6. Tommcd

    Tommcd Active Member

    Location:
    Corby
    I’ve never used the click lock herringbone planks. Thing about floating is if it doesn’t work you haven’t lost anything anyway so worth a try. Advantage of gluing is you don’t get that hollow sound like you can get when you walk on a floating floor. I don’t pva the tongues as the planks won’t be moving anywhere when the glue’s cured but it wouldn’t do any harm if you did.
     
    • Like Like x 2
  7. Ben R

    Ben R Active Member

    Thanks Tom,

    I think the only “question mark” I have left is whether bonding it to the subfloor will help conduct the heat from the UFH/SLC to underfoot-? (i.e. if I float it, will the UFH end up heating the thin airspace between the SLC & the floated herringbone?)

    Edit: Hmm, now I’ve just read about foil UFH! Looks like I can just float the herringbone straight over the foil UFH (no SLC required to encase the UFH). What a minefield! Has anyone used method? :sweatsmile:
     
    Last edited: Dec 7, 2017
  8. Wes

    Wes Active Member

    Location:
    Preston
    Hi Ben just done a herring bone plank floor today says it can be glued down or floated with glued joints didn't have under floor heating though. We put quality underlay down glued joints and floated it look good customer is also my Tile and bathroom supplier so they supplied it. Think it was Ekra engineered flooring.
     
    • Like Like x 1
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