Bostik Showerproof for glass mosaics in a shower?

[hellopaul]

Hello,
I need to tile one wall of a shower with glass mosaics. I have some Bostik Showerproof ready-mixed adhesive - would this work with glass mosaics? The spec of the mosaic tiles is:

DESCRIPTION Crystal glass mosaic mounted on fibre meshback

SIZE 15 x 15 x 8 mm thick
USE Wall only
WEAR GRADE not applicable
SHEET SIZE 300 x 300 mm
SHEETS PER NOM SQ METRE 11
TILES PER SHEET 324
WEIGHT PER SHEET 1.30 kilos

I'm suspecting that people will recommend Bal Mosaic Fix - from reading a few posts on this site, that seems to be everyone's favourite for mosaics. The Bostik adhesive is very pale in colour, so shouldn't affect the colour of the mosaics; I'm going for a white grout.

The wall is dot & dab plasterboard (onto new blockwork behind), then plastered, then primed with 3 coats of Bal APD, plus a liberal larding of Bal WP1 tanking coating in the corners. The wall will get a good soaking whenever the shower is used.

Any thoughts would be greatly appreciated! I'm planning on starting tomorrow (Saturday 10th May 2014)...I've left this "research" a bit late!!:embaressed_smile:

Thanks,

Paul

 

[White Room]

Personally would'nt be using any tubbed adhesive in a shower area, why did you use Bal WP1 in the corners only.

 

[Ian]

Bal mosaic fix is a great choice, especially as you've the wp1 tanking under it. You say you have tanked the corners only, is this correct? You really need to tank the entire wet area.

 

[hellopaul]

Thanks for the super-quick replies, Whitebeam and Bri!

I think my suspicions have been confirmed - that a ready-mixed adhesive would be a bad idea, and the Bal Mosaic Fix is the way to go.

I did the corners with the WP1 thinking that this is where any flexing/shrinking/movement of the walls is most likely, and therefore where cracks are most likely to appear. It's a ground floor new build on a concrete floor, so other than any new-build-shrinkage, there shouldn't be much movement. Hopefully! Also, Bal's guidelines say to apply the WP1 to the corners.

I have plenty of WP1 left over, so maybe I'll slap it all over the wall. Might as well use it up!

While we're at it, any recommendations for a white, water-resistant grout suitable for mosaic tiles?

Thanks again,

Paul

 

[Ian]

Hey up Paul, have a read of the wp1 instructions again, they'll say to do the corners first, then cover the entire wet area in a second phase. As for grout, I'd probably choose microflex from bal, it's super white and is developed to prevent mould