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Tiling on Underfloor Heating
SLC over old tile adhesive
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[QUOTE="Steve_Bcs, post: 988633, member: 50047"] Update Further to this & my other posts about my newly laid dot & dabbed 800x800 porcelain kitchen floor (50sqm) over ufh… So, The plan was to grind down the dabs by 10mm then pour slc into the voids and then a 5-6mm coating over the top. That didnt go well, my dust shroud with hoover attached on the concrete grinder worked on flat area but when trying to grind over dab & voids the dust blew out everywhere. It was taking forever, getting a consistent level across dabs was proving difficult. I abandoned the idea as it just wasnt practical or effective. Called a commercial floor grinding firm - but at circa £2.5k not really an option. Plan B Remove all the adhesive. The dabs of adhesive were laid on a Kerakoll bio tex crack mat (Our tilers choice). These actually prised off the mat pretty much in whole pieces with gentle persuasion from a thin blade bolster chisel gently tapped underneath to break the seal then just pulled up. . After a few days they were all up & in the skip. Tiler back tomorrow. He wont be expecting the whole lot gone. The crack mat is now a fluffy mess so I’m scraping as much off as possible. This should be the tilers responsibility but I’ve done all the removal work so far while he has been away. He’s got off quite lightly so far! Utratile’s tech dept advised that every last fibre of the crack mat has to be scraped or ground off & the floor primed with 2 coats of MSP Multi Surface Primer, before slc can be laid. (Prolevel ultimate) which I’ve already had delivered I tried grinding with an angle grinder & a carbide ribbed cub blade but managed to graze an ufh pipe which are just 3 mm below the surface ( retrofit system). So grinding is too risky. Tried wetting it & scrubbing which worked but will take days. So looking for advice really as to how to mechanically remove the remaining fibres that will not damage the underlying adhesive bed. Floor sander? Or floor polishing machine with a scrubbing pad maybe? I’ve got a firm booked in to properly level the floor on Aug 21st so the tiler has some time to get the mat up. Any thoughts or advice welcome. [/QUOTE]
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Tiling on Underfloor Heating
SLC over old tile adhesive
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