Overboarding floor panels? - Tile Advice

[Ingram]

Hi guys. Been to look at a job today. Upstairs bathroom & en suite. Looks like previous tiler has tiled straight onto those chip board floor panels and they're cracking all over. Blokes asked me to chop tiles up then get a joiner to overboard it. The question is what with? Any advice will be much appreciated. Cheers.

 

[Flintstone]

Hello, Are you a professional tiler?

 

[Ingram]

Yes. Just not prepared many floors like this one. Any ideas?

 

[White Room]

What tiles are you fixing ?

 

[Ingram]

They'll be ceramic or porcelain.Similar to what's down already 300x300

 

[Flintstone]

if there's cracks all over its probably got a lot of deflection, over boarding isn't going to solve that problem. Best to take the tiles up and see what your dealing with.

 

[Rookery]

Probably 6mm Hardie glued n screwed, once I'd had a butchers at the sub floor

 

[Ingram]

Worsed case scenario get sub floor taken up and overboardrd with same thickness ply??

 

[Rookery]

I prefer not to tile onto ply nor to a single layer. If the chipboard is in bad shape then I'd remove it, fix new 18mm ply or t & g chipboard then over-board with the Hardie as above.

 

[Ingram]

Are the cement boards absolutely necessary ? As BAL reckon you can fix straight onto primed T&G Floor boards? Surely the 18mm ply is more rigid.

 

[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