Which size trowel?

[nabby68]

Hi Fellas,
Just about to lay tiles in my kitchen. The floor has been prepared with 12mm WBP Ply laid over T&G and securely screwed. Iplan to use BAL SPF Adhesive, so can anyone advise as to what type and size of trowel to use to apply adhesive and does my floor need to be primed with anything before i start. Thanks

 

[tictic]

what size/type of tiles are you fixing?

the 12mm wbp should be primed underside and edges before screwed to exsisting floor.

if using bal addy just give floor a good clean proir to tiling.

floor trowel from 8-12mm usually for floors,..square or notched(halfmoon)

 

[nabby68]

I am fixing 10mm tiles and is it a nessecity to prime the wbp ply?

 

[Richard C]

Priming the underside is intended to prevent moisture penetrating the underside of the ply which will cause warping & the tiling to fail;it’s also a BAL condition of warranty. Have a look at the product data sheet which also contains other guidance;
http://194.223.92.131/pdf/Technical Data Sheets/B & C Technical Data Sheets/BAL_Single_Part_Flex.pdf

 

[jctilingservices]

i think we mean sealing underside of the boards not priming

 

[Richard C]

i think we mean sealing underside of the boards not priming

Yes sealing is what your after but the two can be the same. BAL recomend their own; http://www.bal-adhesives.co.uk/products/bond-sbr which they actually call a primer

In reality, any SBR or other waterproof sealer will do it, even a couple of coats of old gloss paint will keep moisture out.

 

[nabby68]

ok thanks for all the advice fellas. what size notches for the adhesive would you recommend. The tiles are 400x400. Thanks

 

[Richard C]

Size of tiles is largly irelevant, you need a continiuos adhesive bed under floor tiles; I use a 10mm deep (about 20mm wide) round notch trowel.