Any tips?
I seem to remember I have to Glue and screw 1/4 ply to the floor, seal with PVA then use Balfastflex adhesive?
It was a long time ago so any top tips?
6mm ply screwed every 100mm if floorboards.
Skim flexible adhisive and bed fracture matting on it then lay tiles as normal on top.
Used to go 12mm -18mm ply.
Dont use pva. Use sba. Modified pva suited to tiling. Pva reconstitutes woth water and breaks its bond.
6mm ply just doesnt cut it. Ply tends to be shuttering and so has a very oily resistant surface , dark wood and the adhesive just doesnt stick well to it.
There are much better alternatives crack suppression mats, shluter system ditra which is lke a big lego mat and there is Hardi backer cement board 6mm as well as the Wedi insulation board.
Yep its all more expensive than ply but you only have to tile once.
Make sure existing floor is secure, if it moves either screw it down or replace it using water resistant chipboard glued and screwed
6mm wbp ply screwed at max 150mm centers... Over old or new...
Prime with sbr
Use a separation membrane or my preference is plastic ply.. god knows how but it works
Use a top quality flexible adhesive , my preference is mapai keraquick. .. expensive but works, use spacers and ideally a tile leveling clip. It is essential that you achieve a fully bedded tile... DO NOT use dabs, it will fail
Let it dry overnight before grout with flexible grout
6mm hardiebacker boards screwed to the subfloor and tile with a flexible adhesive, works every time. Don't bother with ply it's the cheap option that "might" be OK.
personal Preference.
Remove skirting and multi tool out architrave lowers to allow tiles under.
If your running all the way through a door can do the linings too.