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Tiling on Underfloor Heating
Anhydrite Screed Question
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[QUOTE="Element, post: 803952, member: 27322"] I have a problem developing with tiles laid over water UFH in anhydrite screed. A few tiles are sounding hollow and are slowly becoming loose. The floor was 'scarified' using an orbital floor machine with a rotating disc with points underneath. The floor was then treated with a primer apparently suitable for anhydrite screeds ( [URL="http://www.tilemasteradhesives.co.uk/preparation-products/primeplus-flexible-primer-and-bonding-agent"]Prime Plus | Flexible Primer & Bonding Agent | Tilemaster Adhesives[/URL] ) following its precise instructions. The tiles were then laid using a 10mm bed of standard Tilemaster Setaflex. I have been told that anhydrite screeds should actually be sanded and then primed and I'm now wondering whether the scarfyer process wasn't adequate for the primer to give sufficient bond strength for the adhesive? It was the first and only occasion I have laid tiles over water UFH. I am returning to the client tomorrow to offer to lift a tile to look at what has happened beneath... Your opinions would be appreciated! [/QUOTE]
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Tiling on Underfloor Heating
Anhydrite Screed Question
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