insulation

  1. S

    insulation board help please (no UFH)

    1950s ex council house, solid concrete floors, about to have the ground floor tiled - hall, kitchen, utility and bathroom in 10mm porcelain tiles. Hopefully it's not too silly of a decision, but to keep installation and running costs down, we've decided not to install UFH in most of it (but...
  2. T

    Insulation board fixing method

    Hi, whats the normal method of fixing jacko/wedi board to timber floors. Ive used these boards a fair bit before but never on floors so im unsure on what way round to do it... Do you set them with rapid set then add the fixings while the adhesives still wet or wait until its set and then add...
  3. R

    Forgot to mortar down insulation board to floor....

    Hi, I bought some sheets of 6mm insulation board to install on my bathroom floor. (It has blue foam in the middle of it.) My subfloor is 21mm treated wooden floorboards. I've freshly installed them and they're nice and level and smooth. (I even planed some of the joists to make sure I'd have a...
  4. D

    pls advise- best insulation, sub-floor and underlayment for tiled kitchen floor?

    My floor joists are good but I need to replace whole subfloor and tile kitchen floor. I am working on a budget but I want to install functional and durable solution according to British standard for both subfloor and underlayment. Ppl with experience, could you please advise what insulation to...
  5. N

    Are insulation boards needed?

    Hello, I’m just having some work done in my house and decided to go with underfloor heating. Seen some other comments about using underfloor insulation boards. Asked my builders who said not needed as would raise the floor too much. Just wanted to check before work starts. Floor is concrete...
  6. acaciaguy

    Most efficient insulation board for thickness

    Hello all, I have a very small cloakroom to do and they want electric underfloor heating. Contrete base and I have about 10mm depth I can use for insulation board below the heating. What board gives the best insulation? Many thanks
  7. L

    Uncoupling membrane and insulation

    I have posted on the forum before about an awful tiling job I had done several months ago. I have found another local recognised tiler who will be redoing the work. He has recommended that I do not need the uncoupling membrane. Any thoughts on this? I am not necessarily questioning his opinion...
  8. 1

    6mm insulation board fixing (wedi)

    hi all, I need to fix my 6mm wedi over my ply subfloor ahead of installing UFH and tiles. As well as mechanically fixing the boards with screws / wedi washers do I need to use tile adhesive or can I use the wedi adhesive / sealant? I spoke to wedi who said their sealant can be used as an...
  9. J

    Insulation Boards thickness

    What are the advantages of 20mm boards against 10mm boards on top of concrete slab. Would the underfloor heating on top heat up any quicker or would the thicker board just prevent the heat from dispersing less
  10. O

    6mm insulation board under hardierbacker for UFH?

    Hi - This is my first post so i should start by saying thanks for all the info i have got from this site in the past years. I have bought electric UFH mats along with 6mm insulation boards. I am looking to tile my 4m bathroom floor which has t&g wooden floor. I will screw this down but looking...
  11. D

    Contract / insulation board on the floor

    My local tile merchant recommended I put 6mm insulation backer boards over my floor rather than the concrete type as they're 100% waterproof and easy to work with. Are they strong enough to take the weight of the bath and cope with me walking about on them while I do the rest of the job?
  12. N

    Wanted Insulation board fixings/washers

    I'm after some fixings or even just the washers to fix down my warm-up 6mm insulation boards. Can collect anywhere in Kent or se london.
  13. N

    Warmup insulation board

    Hi I am currently doing my bathroom and before tiling the floor had planned on laying 6mm warm-up insulation board directly on to my existing floor which is 22mm tongue and groove floorboards. Can anyone advise if ok to do this as there is little information to be found online.
  14. T

    Insulation board selection

    Hi all, some advice would be helpful here. I have a job coming up with natural stone. Part of the floor is being heated with a 12m2 mat. The substrate is a 20yr old concrete screed. My question is my insulation board choice. The mat will be a 200 pro warm mat. I believe that a 6mm board would be...
  15. A

    Insulation Boards on Weyrock

    Hi all, Got my dad's en-suite to tile, planning on laying some electric underfloor heating down and just want verification. It's a weyrock floor currently. My plan was to lay insulation board (link below) on top of the weyrock, then the UFH with some self levelling compound on top of it, and...
  16. B

    Hardiebacker under Insulation boards?

    Hi Guys, in my current bathroom job its been a late decision to have an electric underfloor heating mat. Its 18mm chipboard well screwed down and I've bought, cut and laid 6mm Hardiebacker but not fixed or glued it yet. Shall i do away with the Hardie and just screw and glue 6mm insulation...
  17. A

    Wet tray and insulation under

    have to install a new wet tray in my bathroom conversion. The rest of the house the floors have been finished with dpc Radon barrier, 3 inch concrete, 3 inch insulation, heavy gauge dpc then 3 inch of screed. In my bathroom, I haven't installed the insulation or screed yet! Will be doing this...
  18. M

    insulation boards

    hi all I have a concrete floor to tile with electric heating and 10mm slate I have seen these boards called xp pro insulation boards I usually use the insulated tile backerboards has anyone used these boards and advise me cheers
  19. S

    Preparation Laid Insulation Boards Without Adhesive

    Hi Folks After a bit of advice please. I am DIY installing elec UFH and tiles into my kitchen before the new kitchen is fitted. The floor is a concrete slab which I surfaced with a layer of flexible self levelling compound. Then laid 6mm polystyrene insulation boards onto which I laid the UFH...
  20. F

    Priming Insulation Boards

    who usually primes the back of a cement coated board? I have some times and not others

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