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  1. F

    Do I need a decoupling mat over self leveling?

    Hi all, any help would be greatly appreciated. The kitchen floor I'm tiling (with 600x300 porc) is concrete, it does need levelling and was planning on using mapei. Once I've self levelled would I still need a de coupling membrane on top? I couldn't see any cracks, but there may well be some...
  2. H

    tiling adhesives over warm up heating map

    hi all i having my bathroom flooring installed with 18mm ply over the entire floor joists then add 10mm warm up insulations boards Insulation Boards for Underfloor Heating | Warmup UK - https://www.warmup.co.uk/underfloor-heating/insulation/boards then add the warm up heating mat DCM-PRO -...
  3. S

    Limestone fireplace installed but adhesive stains all over how do I remove?

    Really need a professional to remove the stains left by adhesive on limestone fireplace any advice welcome. Desperate seeking resolution! What products should I use?
  4. R

    Tile over new concrete

    Am re-routing roughed in basement drain about 4 ft. for shower vs original rough in for bathtub. To do so, am smashing concrete and creating an opening about 10" wide and 4 ft long. After installing abs and p trap, will replace removed removed sand and then, concrete with likely Quickrete from...
  5. C

    Tile over tile adhesives

    Hi all, just a quick one what is the best adhesive to use for tiling over tile?. tiles are 600x600 to go on top of the ones already in the bathroom. Any help would be much appreciated. thanks Cj tiling
  6. P

    Tiles over floating floor substrates

    Hi all. I've read a few forum comments or articles about the dangers of laying tiles over floating floors due to deflection and cracking of grout/tiles. Was just wondering if there was any sort of floating substrate board where a professional tiler would be comfortable laying tiles on...
  7. S

    Is it OK to tank over rapid setting render shortly after it sets?

    The rationale behind the rapid setting mortar is to speed up the work. At the same time, a tanking system essentially traps any moisture inside. It seems to me that tanking shortly after the mortar sets (in, say, one or two hours) is a leap of faith. What do you think?
  8. N

    Tile over uneven terracota/brick tile (??) over wet UFH

    Hello! I’m hoping I can get some advice on what to do in my kitchen RE wanting to replace the existing tiles that are over wet underfloor heating. The Kitchen is in an extension that was built 5 or so years ago. The floor is concrete, 100mm cellotex, wet underfloor pipes, 50 or 60mm screed on...
  9. B

    Advice on tiling over tiles

    We’re currently having our bathrooms fully redone including stripping back, boarding, tiling, suite etc. The works have been instructed through one company, who have sub-contracted out the tiling works. Today we’ve had the tiler confirm he’s finished, however I haven’t been happy with the...
  10. S

    How to tile over concrete floor sealed with chemical resistant urethane?

    I was supposed to have a concrete floor finish so I have a contemporary floor look. The contractor did a very poor quality job and I realized I need to cover all the problems with something, so we decided to tile over it. The floor has a water based chemical resistant urethane sealant and I have...
  11. A

    Tilling over different floors (membrane/cement boards) + other questions...

    I need to tile over a concrete floor on ground level (Utility & WC) and a first-floor timber floorboard floor (bathroom). I've bought some 144mm x 895mm wood effect tiles for all three rooms. I also have some Schluter DITRA 25 Uncoupling Membrane which I'm planning to fit directly on the...
  12. D

    Self Levelling Compound Has Hairline Cracks After Walking Over It. 20mm Insulation?

    Hi everyone, Hope to get some help and advice please. I have laid down 8mm of self levelling compound on a concrete floor after priming it so it was a good level to work off (I also included an 8mm expansion joint around the perimeter) (Conservatory is 15 years old and area of 14 m2). I then...
    • Deleted member 57709
    • Thread
    • 20mm boards compound cracks flex hairline insulation insulation boards levelling much over self self levelling self levelling compound
    • Replies: 7
    • Forum: Tile Adhesive and Grout Advice
  13. I

    How to stick LVT Luxury Vinyl Tiles over ceramic WALL tiles

    Hi all, I've some 25x50cm 2.5mm thick vinyl tiles i need to stick over old (sound) shiny tiles in bathroom. Was looking at this stuff but it seems crazy pricey. Ultrabond Eco MS 4 LVT Wall Adhesive Has anyone any experience with doing this sort of job can weigh in and give me some advice please?
  14. A

    Slate over Anhydrite screed - commissioning a

    Hello 45mm Anhydrite screed (Aggregate Industries 'Highflow') is now dry (moisture tested by contractor). Thoroughly dried out with 2 x dehumidifiers running 24x7 for 45 days. Wet UFH system in screed - but boiler is not yet installed - so can't take the floor through a thermal stress cycle...
  15. M

    Tanking over Wedi board

    Good evening, I’m hoping someone can assist with a question I have regarding tanking over Wedi board. I’m currently renovating my bathroom and turning it into a wet room. I’ve laid an Impey Aqua Dec-4 former and for the immediate shower area walls I’ve removed the old plasterboard and replaced...
  16. C

    Tiling kitchen splash back - re plaster or tile over?.

    Hi, new to tiling and just have a quick question. I am tiling a kitchen splash back. The splash back currently has tiles and was wonder should these be removed or can you tile over them? If removed do you need to re plaster or use a membrane maybe? thanks,
  17. M

    Tile over Ditra supporting a very heavy tub

    I'm tiling our bathroom, some basics - floor: 3/4" OSB T&G, 12" I-joists, 16" on center, new construction. I'm using the Schluter/Ditra-Heat uncoupling membrane but no heat cable under the tub that will be going in. The tub: Kohler slipper tub with four 1" dia. stainless legs and a composite...
  18. C

    Tiles over void

    Hi Guys, hoping someone can give me some advice on this. My alfresco concrete slab is tiled. As the slab is 1m above ground, I have a brick retaining wall around it. There's a gap/void between the alfresco slab and the brick ret. wall of around 100mm. The tiles go right to the brick ret. wall...
  19. H

    Preparation Re-Tiling over cement Sheeting

    Hello Tilers, I've lifted and are preparing to re-lay part of our kitchen floor. We are using the existing tiles as they had an issue with, over time, releasing themselves. We’ve removed as many tiles that are loose, chipped away at the existing adhesive, cursed at hurting arms and damaged...
  20. M

    Decoupling mat over self-levelling plywood floor

    I am going to be tiling my upstairs bathroom that has a wooden floor. It originally had wooden floorboards 22mm thick. We have removed all the tongue and groove floor boards as they were rotten and uneven. The joists were solid and in good nick. It has now been sheeted with 22mm Ply and screwed...

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