Tiling concrete floor and UF heating - TilersForums.com

[Andy Allen]

Right if you look at next paragraph down that is what I challenged them on. Saying do not prime surfaces to be tiled on . I challenged them and they ok not a problem . So I wouldn't rely on that . I've not finished bal tech will get a call from Mr pain in the arse from salisbury

I know first hand priming certain surfaces using that adhesive reduces the bond strength considerably.

 

[Dumbo]

This is taken from there pdf, the adhesive is bal single part fast flex, an adhesive I use all the time on wooden substrates with cement boards...

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So just had a chat with bal tech and they say no need to from their point of view but you could to slow the porosity of the board but you should check with the manufacturer . The guy was very non committal and ambiguous but at no point did he say do not do it . I also asked if it would be detrimental to the bond strength and he said no . I dont know if bal board is a lightweight board , i know it not cementitous but they recomend priming with apd

 

[Andy Allen]

So just had a chat with bal tech and they say no need to from their point of view but you could to slow the porosity of the board but you should check with the manufacturer . The guy was very non committal and ambiguous but at no point did he say do not do it . I also asked if it would be detrimental to the bond strength and he said no . I dont know if bal board is a lightweight board , i know it not cementitous but they recomend priming with apd

Don't believe you...!

Do you have photographic evidence of you on the phone to them, holding a copy of today's news paper, along with a tape recording of the conversation....!...

Joking a part, if you had a failure on a job and primed the boards, I can guarantee, no, hang on , I can 25 year guarantee bal will blame that as it says in the pdf do NOT prime the board's...

 

[Dumbo]

Yes you are right . But to be honest if was to have a failure I wouldn't bother contacting anybody well not so since my dealings with bal when they told the grey colour grout i had was in their parameters for limestone . They are just dishonest the lot of them

 

[Bond]

If the hollow areas are small and isolated, you could cut-out / core the insulation and pour in some slc mixed with SBR, which should fill in any voids.