Overboarding floor panels?

[Rookery]

Yes, in my opinion. It's already failed once so why take a chance.

 

[Flintstone]

You can't tile on to chipboard flooring

 

[Rookery]

You can't tile on to chipboard flooring

You can with Mapei S2 Quick and Weber do a similar one. BAL probably do one too. I'd still over-board though.

 

[Dumbo]

You can't tile on to chipboard flooring

Adhesive manufacturers say you can but it fails most times . S2 adhesive is no substitute for a badly prepared floor.

 

[Flintstone]

I would never risk it

 

[Ingram]

So even taking up the chipboard. Re boarding with 18mm ply and tiling onto ply with BAL Silgle part fast flex is still not good enough? Needs 6mm Hardie??

 

[Time's Ran Out]

Take old tiles up, leave but clean the chipboard floor, prime and fix (adhesive under and mechanical fixings) 6mm Hardie backer boards across joints. Tape Hardie joints and your good to go.
The only issue would occur if chipboard underneath got wet!
Also you have to be sure that the chipboard is well fixed, and no deflection.

 

[Boxtiling]

The bal fast flex should do the job if you've not already done it

 

[Time's Ran Out]

The bal fast flex should do the job if you've not already done it

And what preparation to the chipboard substrate?

 

[Dumbo]

And what preparation to the chipboard substrate?

Unless it's changed tj bal used to say this was OK for chipboard although I must say I wouldn't do it .