Attaching No More Ply to breeze block wall

[Gross Loydman]

I'm going to be boarding my bathroom with NMP ready for tiling. I've taken the walls back to breeze block but am unsure which adhesive to use. The NMP adhesive seems really expensive so was going to use a 'single part flexi rapid set adhesive' as specified on the NMP website. Does anyone have a particular recommendation, and ideally a link to the best stuff to use?

I'm going to be using ceramic tiles, not porcelain, but want to make absolutely sure that the boards are firmly fixed to the walls (I have nightmares of the boards coming away from the walls and having to re-do everything). Do I need to mechanically fix, and if so how?!?! It looks like the NMP would be pretty difficult to countersink...

Thanks in advance.

GL

PS The NMP guy recommended PVA'ing the wall before fixing the boards... I know that PVA'ing a substrate that you're going to tile onto is a no-no, but what about breeze blocks prior to NMP'ing?

 

[ozboz]

Stray from the NMP spec mate and you could end up being sorry, I would consider other options, dry line, plaster or render come to my mind, if the tiles are fairly large, possibly, maybe you can fix onto the breeze blocks if they are reasonably flat and plumb, but get prof advice from Mapie Tech, in fact it maybe advantageous to talk to them anyway and they most prob give you a good spec, remember cheap can be nasty ! ok mate Steve aka ozboz

 

[Gazzer]

I have never used it on the wall but i have over a screeded floor ( it was specified as a thermal board but dont believe that )
Anyway all boards were primed with SBR and stuck down with SPF adhesive.

 

[White Room]

I would dry line if you using ceramics IMO

 

[Gazzer]

Why NMP anyway, seems very expensive IMO.

 

[devonmark]

dot and dab plasterboard would be the better and cheaper option, you can then tile straight onto it, and if you wish you can then tank with a tanking kit

 

[steve187]

dot and dab plasterboard, or direct onto breeze if good, as ozboz suggested