Ardiflex 7001

[TonyW2]

Tiling 3x1.5 m onto chipboard on 2ft centre joists I am tempted to tile direct using Ardiflex 7001.with lots of extra screws at 100cm centres along the joists
Their tech section say its OK.

Has anybody any real world experience of doing this and with what long term result?

(No debates on whether ply or backerboard is best, please)

 

[Richard C]

No debates on whether ply or backerboard is best, please

Sounds like your just looking for a comfort factor to OK what you’re going to do anyway so that sort of rules out any further advice from me . Depends how long you want it to last but at least take some time to read the manufacturers recommendations about floor rigidity, preparation, priming etc.

I would never, ever, ever tile over chipboard, seen far too many failures; in fact I always rip it up. My main concern would be the 600mm joist spacing, without reinforcing or over boarding your taking a risk; if the base isn’t sufficiently rigid, your tiles will fail. I assume you mean 10cm centres for the extra screws not 100cm.

 

[TonyW2]

Whats a 0 between friends?

Definately not getting an OK factor then? Thanks though, and with the number of thanks you have already collected, I am off to buy the 6mmhandibacker..

In that case, any tips for the best tile cement and what adhesive for the board to chipboard?

 

[Richard C]

Hardy recommend min 15mm WBP under 6mm Backerboards @ maximum 600mm joist spacing so relying on the crap board under there is going to leave you marginal IMO. Even in perfect condition, it’s nowhere near as rigid as WBP & I’d be inclined to use Hardibacker 500.

Although I know you may not be keen to do it, I’d rip the chipboard up & start again with 22-25mm WBP; keeps the threshold at a reasonable height as well. I’m a BAL man myself & will use nothing else but Ardex is good; not heard anything bad about it.

Got to go out now but what size/type tiles are you laying?