Fixing porcelain over OSB

[DavieA]

Quick query on chipboard floor and porcelain tile.

Floor screwed and little movement however has had a lot of hatchs cut in it anyway am not happy laying onto chipboard so advised dukkaboard fixed using adhesive and screws then tiling on that. BUT its almost double the price of Ply to buy and install.

Is this still sound advice and will dukka be suitable ?

Cheers:smilewinkgrin:

 

[Rookery]

I'd over-board with Hardie then fix with RSF.

 

[Dougs Third Go]

as Rookery, hardiebacker 250, glued and screwed

 

[CJ]

As Above.

 

[nybor62]

agreed with all above