priming before tanking

[marko56]

am about to use an ardex tanking kit on my shower walls - one side is skimmed , the other is aquapanelled - the instructions don't go into too much detail but should I be priming the walls first with bal primer or not ?

[Scott]

Was there no primer in the kit? Not sure about using a bal primer on ardex though. Which bal primer is it?

[marko56]

there is no seperate primer in the kit - it comprises of a liquid (solvent free acrylic dispersion) and a reactive cement based powder that is mixed 1:1 and rolled on - I haven't actually got any bal primer but would have used bal primer apd if needed.

[jay]

Ardex Product Range

might help

[Sir Ramic]

It makes no mention of priming before.Ardex-WPC.pdf

[Scott]

Looks to me like it just goes straight on then? If it doesnt say prime then i guess it wont need it


Edit: I just read that too neale

[marko56]

I'm going with no priming - do these kits reduce the weight of tiles allowed?

[Sir Ramic]

I'm going with no priming - do these kits reduce the weight of tiles allowed?

No, same as substrate allowance

[marko56]

my tiles weigh 16.9kg /m2 (just had em on scales!) - have got bal supercover rapid flex adhesive - I'm worrying about the plastered wall not taking the weight - will they be O.K?

[Sir Ramic]

if its a skmmed plasterboard then its slightly over but i would do it.

[marko56]

no , it's not skimmed plasterboard - the walls were reskimmed last year - so under the skim is the old skim , undercoat plaster and then breezeblock - I'm not looking forward to this reply!

[Sir Ramic]

You should be fine on that.

[Scott]

If it sound then it should be fine. There are tolerances

[marko56]

phew! - thanks lads - great help

[Sir Ramic]

Right now go and do some work...lol, but seriously...Thank you for asking first

[whitebeam]

Thats two coats with the ardex stuff, mine was