Help with tiling onto ply overlay.

[Jeffrey4670]

Hi, I intend to tile a bathroom floor this week. I have problems in using anything more than 6mm external ply. Would like to use more, but not able to. I am fitting 6mm ply directly onto T&G floor boards. I intend to screw approx 100mm centres. I intend to over kill the fixings to make sure it's secured down. Do I PVA to the underside of the ply & joints or do I use P51 primer? and what reason is this for, please? Also do I use Ardex P51 on top of the ply for the adhesive to take. I will be using felxi-Adhesive & flixi-Grout.
Something like Ardex 7001 adhesive. Thanking you, Jeff from West Yorkshire.

 

[wivers]

I can only tell you what i do mate. I screw the ply down prime wiv BAL bond all over surface then lay the tiles wiv 1 part BAL Rapdid set flexi or palace flexi.

Another option mate would be to maybe take all the t&g up and fix thicker ply direct to the joists.

 

[Dave-T]

might just be me, but as a rule, i allways use fastflex if im laying on wood. If it was me, i'd fastflex 6mm dukkaboard to the floorboards (thicker boards if possible), then fastflex the tiles on top of that. then grout with lashings of gt1. Works out more expensive i know, but ive never known floors to crack up with fastflex. you never really know how much movement theres going to be with wood, so i just never risk it.
Maybe i'm just overcautious.

 

[DHTiling]

fit 6mm backer boards and tile with flexi- adhesive and grout.. you'll have no probs.
make sure floor boards are secure...

 

[CJ]

Ditto above

 

[wivers]

Maybe i'm just rubish..... wheres my mate Leggit.

 

[grumpygrouter]

Recently did my kitchen floor. I overlayed with 9mm wbp ply and used P51 primer along with Ardex 7001 - it's not coming up!!!!!

(I know the ply is a little thin guys but it's sat on 25mm T&G chipboard and I had room constraints).

Be brave and mix the 7001 as per the instructions on the pack, it should be very thin, apparantly this gives a solid bed. I had mine a tad too thick I think, but it still went down well.

 

[McP77]

Fastflex or Dunlop Tile on Wood, as long as the t&g boards are in reasonable condition and screwed down.

 

[GazTech]

The answers were out there somewhere !

 

[Jeffrey4670]

Hi, Thanks to all of you for your help. I managed to do the on-suite bathroom floor today with 6mm external ply. I used PVA to underside of ply & Ardex P51 primer to take flexi-adhesive & grout. Next time I will consider Tile backing board. thanks again, Jeff

 

[Dave-T]

no worries. Glad everything went ok. Tile backer boards are well worth learning about. You can do some awesome stuff with them. Curved bath panels, wet room walls etc. Theres so many uses for them. I personally use dukka board the most... cant really fault it.