Discuss Anhydrite Screed (gypsum based) in the Australia Tiling Forum area at TilersForums.com.

Ajax123

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Weber anhydrocol ( summit like that) has been out a long time as has kerakols ... But as usual the UK are behind ...


Alan's has to state as a binder representative what in his opinion is the method he advises to use , it was only a couple yrs or so back , Alan's method was epoxy primer then cement based adhesive... And as materials change then so does advice.

Materials advance widler and as we all know they take time to catch on but as long as a screed is dry etc , then The acrylic method and cement based adhesive IMHO is far from wrong... Floors fail because of error.
Yes a gypsum adhesive has more compatibility as its gypsum to gypsum but it's been mentioned many many times , adhesive manufacturers are ripping people's eyeballs out with costs.

For my part I am all about eliminating risk where possible and managing it where it cannot be eliminated. There are probably 7 or 8 manufaclturers now offering gypsum addy which has brought the prices down. If you must use cement then an epoxy primer is chemically the best as it stops the migration of moisture borne sulphates.. If on the other hand you are a tiler that does things properly without compromise then an acrylic primer and cement based addy will work.
 
J

jonnyc

I pay roughly £14 per bag for spf, but my supplier charges £21.33 for anhyfix.. big different on material price
Why not use not use anhyfix just under ditra and ordinary cement based on top of ditra.with a 4.5mm notch you should be able to stick down about 9-10sq mts ditra .so not too expensive
 
Cheaper if you buy a pallet ;)

I would say Jonnys recommendation of Anhyfix to fix Dural is ideal.

I was wondering if you'd pick up on the Supplier stuff Lee :lol:
 

Dave

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I'm tiling an anhydrite screed this week , PR360 and weber cement based for me. :).... Try getting my builder to switch to gypsum based is like finding hens teeth lol lol ... He likes to stick to what is working just fine these past few yrs.
 

Ajax123

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Still nothing wrong with that way @DavidHoweTiling nothing at all.

however, judging by the sales on Anhyfix, i believe many are moving to a gypsum based adhesive, i guess its all about education, without the forums we would all probably still be none the wiser.

i passed a guy to you today lee. Hope he called...
 

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Anhydrite Screed (gypsum based)
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Australia Tiling Forum
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