M
Mark S
Hi, the fact that it took a couple of hefty chisel strikes, and some 5mm of screed indicates a good bond, again looking like the UFH was cranked up too quick.
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question for Mark s and Alan, when I tiled on these types of screeds many years ago in germany when sanded they revealed an aggregate which seemed to have a high percentage of quartz sand ,when i recently tiled one over here I sanded the floor back a great deal only to reveal a "fly ash" very fine aggregate with hardly any decent grained aggregate ,i have been told that the anhydrite companies get subsidies to take industrial waste from incinerators to be used in the aggregate for these screeds my question is have the aggregates been changed over the years from quartz sand to some alternative and do you use toxic waste from incinerators in the aggregates for these screeds ?
Ironically unless you have anything in writing confirming floor was tested and passed all appropriate readings ready for installation of tiling, you the tiler will be at fault if no evidence to support, as you didn't get confirmation or check that tiling can commence, once you start fixing you can't go vack.Thanks Ajax...thats what I thought. As mentioned I didn't sand the floor as screed company said not to...I did try to sand and scrape a part but nothing came off...no dust...nowt. If moisture is the cause who is to blame? I don't do a bomb test and relied on dates given by customer and screed company who now say 120 days not 75 as previously. I told customer not to put up heating but he did so just my word against his. The heating to the travertine floors has been physically shut off for now so that if moisture levels are too high the floor can still breathe and hopefully be ok. Failed floors are porcelain. This type of screed obviously has some benefits...but not as regards tiling onto!!!!
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