Latex Plus or Hardi Backerboard or both

[paul_v]

I'm soon to be moving into my new build house and will be tiling the upstairs ensuite which is approx 2 Sqm and will have a t&g chipboard floor.

Unfortunately the walls are built on top of the floor so removing the chipboard is not really an option. My intention is the use large format porcelain tiles. I have laid these on WBP ply before using mapei keraquick with latex plus and was very impressed with the results.

Do I need to cover the chipboard with hard backerboard first or can I just tile straight on the chipboard with keraquick. Everything I have read about tiling on chip board is says its a big no no and I completely get why, but I can't really avoid it in this case and Im not sure if it's really worth using backboard in such a small room.

What would be the best option here, I would rather avoid using backboard because of the big step I will end up with but I don't want to end up with problems in the long run.

 

[vinn]

What you propose will work. No backer board needed.

 

[Lee@TileTown]

Keraquick is an S1 adhesive, so only suitable to be used if overboarding with Hardie/No More Ply.

Tiling straight onto chipboard is not best practice, we would recommend either over boarding with no more ply/use an S2 adhesive like TileMaster Ultimate or a decoupling matting (dural/ditra matting)

 

[vinn]

Mapei list Keraquick as suitable for applying direct to chipboard.

 

[paul_v]

Thanks for all the replies guys. Ill give the backboard a miss then seen as its such a small area and just use keraquick mixed with latex plus to make it S2.

 

[L95]

Bit late to the party but try and find a local supplier of an S2 and see how it compares in contrast to mixing with additives. I would personally use a high end S2 such as the BAL Single part Fastflex which is costly but a more than adequate adhesive. Or I would use 6 mm Hardiebacker tiled over with a flexible adhesive. S1 with an additive is a last resort for me.