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Canada Tile Advice
Tiling concrete floor and UF heating
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[QUOTE="Steve01, post: 921452, member: 51371"] Hi Thanks for the replies Firstly I am definitely not doing this myself its too big a project - I have done a smaller area myself before though and did all the research hence wanting to ensure the tiler takes the right approach When I say 'I' it refers to getting the work done on my property [USER=12267]@Ajax123[/USER] the cost does not worry me - I am the one that has insisted we do everything- insulation boards prime at every stage slc etc and so money is not an issue but want the job done properly I asked 4 quotes from checkatrade which were similar and went with the one that seemed like he would take his time and do a good job it was interesting to see what different tilers said and hence the confusion also not many tilers were comfortable with the UF heating or had a consistent view on what needed doing some said SL on top of old tiles. some said no insulation boards needed and some said that don't need to self level on top of the UF heating hence the initial post to all you experienced tilers out there for some help - sorry but I thought that what this forum was for - for tilers but also homeowners like me to ensure we get the right people for the job and some independent QA on what they are doing Anyway really appreciate the advice and as [USER=29639]@hmtiling[/USER] says the right approach is as he has outlined from what research has told me so the work has started and the following has been done by the tiler: 1. old tiles taken up - approx 30sqm this left lots of lit bits of glue and tile so it wasn't a perfect surface 2. the floor was primed 3. the tiler was happy to put the 6mm XPS board down on there using the adhesive to level as he went rather than slc first 4. once the board was down he primed on top again using the UF thermal primer - I noticed some of the insulation board not completely stuck down in the evening and so asked him to go over where it was not done properly - yes that did ring alarm bells 5. after that he self levelled using mapei ultra plan - he ran out of that and used another universal SLC (which says it is suitable for UFH according to the package which I ensure I checked ) to top up the non UFH mat areas and some of that was probably used on the mat to finish off as far as I can see 6. THE SLC has been drying for 3 days and still not 100% dry but hard in most places and still drying - I am told that due to the large area and cold weather this could take a bit longer As it dries I have been checking over the area with the SLC and some areas seem hollow although not cracking - when I knock with my hand then some areas are solid and some are hollow like there are air pockets under the insulation board where it has not perhaps stuck to the concrete or there was not enough adhesive is this something to worry about - i.e tiling on top of the hollow areas OR will I need to get those areas smashed up and corrected - no doubt the mat would be damaged and would require almost restarting ? I did my research and hired someone who seemed to have the right credentials but am now a bit worried - I do pay attention to detail and have been checking work at every stage - its who I am - if I wasn't on site or left him to it I am sure all the tiles would be down now and I wouldn't know any different until perhaps I had issues in future I am sure I will get lots of advice on the type of tradesmen I should or shouldnt have got but would really appreciate some advice on what to do next primarily the concern is around the hollow sounds on the floor - it is hard and solid to walk on but as I said just hollow in some areas which I don't want to cause issues in future I will be getting 600 x 600 porcelain tiles fitted Many thanks in advance for your any advice [/QUOTE]
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