I think most of us tilers are agreed on not using PVA in conjunction with tiling. But have you ever had to argue with a customer or his 'know it all' next door neighbour over it? I know I sure have because they or their friend did their job with PVA and there was never any problems.
Probably the worst was a retired lady telling me I didn't know my job when I said that PVA over an asphalt covering prior to tiling was not a good thing. Apparently she'd read it in womans own or something like that.
Cheers,
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