Tiling onto 18mm plywood

[Arthur 51]

Hiall. Should I treat this wood before aplying tiles to it? And..vot vid?

Thanks.

Arthur

[The Natural Philosopher]

I never bothered.

Just use a thick (>6mm) stiff bed of quality FLEXIBLE adhesive.

[TheScullster]

"The Natural Philosopher"wrote

I'd be inclined to give it a weak PVA coat, to stop the moisture being drawn out of the adhesive before it sets.

Phil

[Ian_m]

Be very careful some tile adhesives warn you off using PVA on wood (even plaster) as the PVA stops the adhesive soaking into the wood, thus fails to grip.

[The Natural Philosopher]

Ardex, a company whos products I have grown to respect, seems to imply a sealer (P51) is in order, so I guess thats the fullk monty. I didn't bother though, and all is fine here.

I did PVA the screed tho IIRC..

[Andy Hall]

Can be a bad idea. Discuss with the adhesive manufacturer first. Ardex and BAL both advise against it because it weakens the bond.

[Andy Hall]

This has large format limestone tiles which are very heavy.