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Conservatory floor: remove old tiles, put new ones, app. 15 sq.m. Old tiles have cracks which may indicate floor movement. Would levelling compound (backer boards (?)) plus uncoupling membrane make it?
Discuss Floor preparation in the America area at TilersForums. The USA and UK Tiling Forum (Also now Aus, Canada, ROI, and more)
YES. chipboards.Sorry for the slow resposne. Is it a timber sub floor?
Thank you very much. tried testing it for deflection, yet this was not, frankly, quite conclusive. However, there are some engineering calculations and seemed within tolerances, though at the limit.All depends how much bounce there is then. The chipboard floor might need lifting and extra supports putting into the frame. Or you may get away with simply overboarding with hardiebacker. You'll have to judge it for yourself as to how much movement there is. You can read about "deflection tests" online. Essentially you need there to be no visual movement in the floor if you jump on it.
If no underfloor heating, I wouldn't bother with an uncoupling mat personally. The problem in that floor is bounce and the mat won't help with that.
The backerboards should hopefully give the floor the rigidity it needs.
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