Tiling on floor boards - 9mm or 12mm ply?

[IrvWorth]

Hi everyone.

I plan to put 8.5mm porelain tiles over 1930 floor boards in my kitchen - they are not in best condition but i will fix down securely. I have bought some unibond adhesive, flex additive and some primer for plywood.

question is, can i get away with 9mm WPB ply? i realise that 12mm would be more solid but could really do with using 9mm as there is already a difference in floor heights between the kitchen and dining room and we have knocked the two together.

also, should i return the unibond and get some of this BAL 2 part flex stuff?

any other tips for porcelain tiles welcome.

Cheers
Al

 

[jefoss]

ideally you should use 12mm but if you use a very good flexi adh youll be fine.

first thing you should do is fashion some sort of ball and chain out of anything you can find in the house (unless you actually own a ball and chain) and hit youself in the b***cks with it for buying unibond.

 

[Richard C]

ideally you should use 12mm but if you use a very good flexi adh youll be fine.

I would still use 12mm; but some would even say 18mm; if your stuck for height, I would rip the lot up & start again with WBP; the base has to be solid or it wont last, using even the best products

first thing you should do is fashion some sort of ball and chain out of anything you can find in the house (unless you actually own a ball and chain) and hit youself in the b***cks with it for buying unibond.

jefoss hilarious comment aside, you've answered your own question on that one. Don't even think about the unibond unless you plan some time/cash to rip it all up & start again in about 3 weeks. As far as tips go, read the sticky & then read back through the archive tiling posts.

 

[gcol]

12mm ply and Bal rapiset flexible or Bal single part flexible. No need for primer on ply.

 

[IrvWorth]

Hahahahahaha! Thanks Guys.

 

[Brainy]

Dont forget to screw the ply every 6".

No good putting down 12mm ply and only screwing it in the corners!!
Brainy

 

[gcol]

Welcome to the forum Brainy. Just a heads up.... there's no point in dragging up old posts because undoubtedly the work/problem has been completed and/or the poster has left the forum.