Correct build-up of subfloor for UFH + engineered herringbone planks?

Discussion in 'Subfloor Preparation' started by benraz69, Nov 30, 2017.

  1. benraz69

    benraz69 Member

    6
    0
    1
    Hi all :)

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

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

    Thanks in advance :)
     
  2. dazlight

    dazlight Super Moderator

    6,839
    1,615
    113
    Why the electric UFH mate. Wood won’t be that cold.


    Sent from my iPad using Tapatalk
     
  3. benraz69

    benraz69 Member

    6
    0
    1
    Thanks for the reply Daz

    I’ve had two walls taken down: the one between the kitchen/diner & the one between the diner/lounge. Between that & the fireplace/bifolds/kitchen units - there’s almost no room left to hang a radiator in the kitchen/diner!

    (I’m sticking one in, but it’s nowhere near enough to heat the whole room).
     
  4. brenchy

    brenchy Well-Known Member

    126
    41
    28
    You would not normally float herringbone. Also Just check the output on the UFH some electric is not man enough for the wood also check your thickness off blocks you don't want to do all this and get the Tog wrong !
     
  5. benraz69

    benraz69 Member

    6
    0
    1
    Hi Brenchy,

    What's the reason for not floating herringbone? (I'm talking about regular sized planks, not small blocks/parquet). And if I do need to stick it down, what sort of product should I use to stick it to the SLC?

    Thanks for the electric UFH advice, I'll be sure to buy a 200W/m2 mat :)
     
  6. brenchy

    brenchy Well-Known Member

    126
    41
    28
    Does the product say you CAN float it first ? What make is it ? Have you ever floated a herringbone before ? are you sure you don't mean Chervon planks ?
     
  7. benraz69

    benraz69 Member

    6
    0
    1
    I haven’t got as far as ordering samples yet, but for example, if you google “wood4floors P1200” - it says under description/installation you can float it (sorry, can’t post links yet, as I’m too new apparently).

    I have floated & portanailed floors before, but I’ve never laid herringbone.
     
  8. brenchy

    brenchy Well-Known Member

    126
    41
    28
    Setting out will be fun then if you decide float these are 600mm staves:)
     
  9. brenchy

    brenchy Well-Known Member

    126
    41
    28
    I would suggest you read the fitting instructions with the underfloor heating it requires full bonding. Don't float.
     
  10. benraz69

    benraz69 Member

    6
    0
    1
    Thanks Brenchy,

    I’ve been doing a bit more research & discovered foil UFH, which allows you float the flooring straight over the top (no need to encase the UFH in SLC). Anyone had any experience with this?

    P.S. Hope you don’t think I’m trying to be difficult - just trying to make sure I’ve considered all options :rolleyes:
     
  11. AngryAndy

    AngryAndy Well-Known Member

    380
    126
    43
    I think Brenchy has given you sound advice, which if you are smart, you'll follow. Without doubt the best way to install this type of flooring is to fully bond it to the ground. Apart from the stability this gives the floor you are not adding a layer of thermal resistance by way of underlay. Good luck with your project.
     
  12. merit

    merit Well-Known Member

    7,969
    1,639
    113
    Why would you consider floating the floor when the manufacturer states it has to be glued? We always glue all of our wood floors down...the last time we floated a floor (because the customer wanted it floated) they then asked if we would uplift it and glue it down due to the feel and limitations of floating a floor.


    Sent from my iPhone using Tapatalk
     
  13. benraz69

    benraz69 Member

    6
    0
    1
    Which manufacturer? The one I mentioned above says you can float it.

    But I appreciate your feedback & experience guys. I’ll glue it I just hope I don’t lose too much heat through the SLC + glue Vs laying the herringbone straight over foil UFH.
     
  14. merit

    merit Well-Known Member

    7,969
    1,639
    113
    I though it said you have to stick over ufh? Anyway it should do, much better job as others have stated. You will still need slc, underlay will not fix a uneven floor


    Sent from my iPhone using Tapatalk
     
  15. brenchy

    brenchy Well-Known Member

    126
    41
    28
    upload_2017-12-9_8-44-31.png
     
  16. brenchy

    brenchy Well-Known Member

    126
    41
    28
    This is from the Wood 4 floors website regarding UFH. I'm still wondering how you would even float a herringbone as soon as you start to tap the staves up the whole floor would move and you would have lightning gaps in the floor its not like floating a plank.
     

Share This Page