insulation

  1. Q

    Heat retention tests of insulation boards

    I spent a bit of time this morning performing the tests. I performed the test on the garage screed, then 18mm WBP, 10mm Marmox then 6mm Marmox. I chose not to use any 20mm boards as realistically most of us never use them. To ensure continuity the water (2 pints) was boiled then left one...
  2. J

    Warmup Insulation Board over Hardiebacker???

    Hi All, The bathroom is still coming along and despite loads of life issues slowing it down it's going well. I discovered that installing 10mm Warmup insulations board would make my life easier in terms of installing the probe as opposed to digging through the already installed 6mm Hardi that...
  3. J

    UFH Running cost difference with 6mm verses 10mm insulation board

    Hi all, fairly obvious post as the title suggests. I'm beating myself up as 10mm would obviously provide more insulation (laid on solid chipboard floor in bathroom) but how much difference? Would really prefer to go with 6mm due to the step down to the landing carpet. i can't seem to find any...
  4. M

    insulation system

    Duplicate tread sorry.
  5. D

    insulation boards on T&G

    Hi all , Was looking at a job today where the sparx were fitting the UFH on insulation boards they had installed and tbh it looked a bit iffy. Not being a fan of such methods I don't use the stuff on timber but had a couple of Qs for those that do. 1. Do you Screw AND glue or do...
  6. L

    thinnest UFH insulation for tiles?

    hi, what is the absolute thinnest UFH insulation option to be used above a concrete floor with a porcelain tile top floor? i don't really have enough room for a 6mm insulation board. i thought i could use a 2mm foam insulator but i just realised those have too much 'spring' and thus are...
  7. F

    Insulation effectiveness

    Hi First post here, and delighted to discover the forum before I embark on the UFH adventure! I'm converting my garage into a wine cellar and therefore insulating it. I am installing UFH onto a concrete floor (at ground level). I plan to lay 10mm Marmox board then UFH mat + SLC, then tiles...
  8. S

    Tiling over 25mm edge insulation at door threshold

    I have a hot water underfloor heated anhydrite screed that is about to be tiled with 16mm thick travertine using a GBTA adhesive. I was wondering how to tile the at the tri-fold door threshold. From the outside there is the sill, then a 125mm block then 25mm of cellotex and 10mm edge...
  9. R

    Insulation boards

    Hi guys, Customer asked me two questions today and embarrassingly I didn't know the answers, although it must be said they were slightly obscure. He wants 60m2 of garage floor tiled, in porcelain with electric heating mesh. His questions were, are insulation boards load bearing, ie. would they...
  10. E

    Electric UFH, Insulation and Ditra

    Hope someone can help. I'm having my kitchen refurbished and want to install UFH. The current floor looks as though it is tile on tile as, at the hall door threshold, it sits the thickness of a tile plus adhesive proud of the hall flooring. I also suspect that the concrete floor substrate is not...
  11. D

    Thinnest insulation under DEVI

    Hi all , Got a DEVI mat from my bathroom and want to put some insulation on the screed first. Marmox appear to do a 4mm board but I was looking for something a little thinner and less rigid. I've used a product on site before that was probably no more than 2mm thick but can't remember for...
  12. C

    Mixing Plywood and insulation boards

    Hi. I am laying floor heating over around 11m2 on a concrete floor. Overall area is 20m2 for cupboards and a utility room. I have bought enough insulation boards 6mm thick for the 11m2 and planned to use plywood to raise the rest. 1) Is it ok grouting plywood to the concrete floor? 2) I would...
  13. C

    6mm insulation boards on concrete under slate floor

    Hi just hoping someone far more knowledgeable will have the answer. I've got a concrete floor which is a bit crumbly in places. I plan to stick down 6mm polystyrene insulation boards then underfloor heating and slate tiles. Is this sensible or will I ruin the tiles?
  14. AliGage

    Insulation boards

    Evening Ladies and Gents, Anyone know of any good deals on insulation boards at the moment? I've got a conservatory floor to do next week, UFH, SLC and honed slate. 18m2, about 25 boards i think is what i'm after.
  15. T

    Newbie needs help - tiling on concrete floor, insulation and wet UFH

    Hi all, new here so hope you can bear with me. Have already read loads of posts that partly address my queries, but am still a little unsure how to proceed. Have had a lot of trouble with cowboys and tradesmen who don't get back to me re quotes etc recently, so would like some advice if...
  16. C

    Laying insulation matting under tiles

    I have been asked to lay a rolled insulation matting under tiles in a bathroom with a ply sub floor. The customer has supplied this and I have not used it before. Does anyone know the best way to lay the matting. I was just going to use the same rapid set flexible adhesive that I have for the...
  17. O

    Insulation thickness and what wattage for UFH?

    Hi and thanks in advance for all advice. we are making 2 bathrooms in the top floor of an old barn, (south west France) .each is approximately 15m2. The ceiling height varies from 3m to 5m. One bathroom has 2 external walls, the other 1 external wall. There is an empty space underneath them...
  18. Sean Kelly

    Insulation boards or Hardiebacker

    I met a tiler who always used insulation boards instead of Hardiebacker. I’ve got a job coming up next week that involves taking up 6mm ply (nailed & probably glued) to the floorboards. The kitchen units were then put on top! I’ve quoted for Hardiebacker, but am now thinking that 6mm...
  19. E

    Heat Mat On Concrete In Wetroom- Is Insulation Required?

    I'm going to be installing a heat mat (either Warmup, Devi or Uheat) in a wet room installation which has a concrete ground floor. Do most people lay insulation onto a concrete floor before installing a heat matt and SLC? Or is it quite normal to lay the heat mat directly onto a concrete floor...
  20. B

    30mm Insulation boards

    Hi folks, Have a job coming up which requires 30mm Marmox type boards - needed to level up and match adjacent floor height (other side of a door threshold) Anyway, local prices are pretty steep, so trying to find any useful contacts for cheaper prices before i spend more hours trawling the...

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