Chipboard suitability with hardi

[DavieA]

Here's an update on the upcoming floor. Spoken to joiner and he has no way of adding noggins between joists because of the ufh pipework so advised not to use sheets of ply as under every joint must be supported. Which makes sense, so if chipboard is used which is obviously 22mm thick and t&g, screwed to joists can (if the floors solid and bounce free) cement board such as hardi be fixed as per Richs post using a thin bed of addy and screwed at 150mm centers into the chipboard?Thanks all for any input on this.

 

[jay]

Yes it can but floor must be deflection free,
is this in a bathroom

 

[DavieA]

No Jay its hallway,kitchen and dining room so no wet areas.

Bit of info Wet piped ufh, intention IF bounce free is to,

1.install 22mm t&g chipboard screwed to joists then lay 6mm hardi fixed at 150mm with screws to chipboard and on a 6mm bed of keraflex.
2.lay dural ci+ bedded with keraflex
3.lay opus travertine on thick bed of keraflex white addy,seal, grout using felxible grout and seal again.

Sound good?

 

[jay]

sounds fine around the edges of the cement sheet screw every 75mm have a bo peep at this mainly last pic (noy sure if the sheets come with dots over there) http://www.google.com.au/url?sa=t&s...2r2hAw&usg=AFQjCNGAfcfr-TQzgaPxtc9s6huVxFSpyg

click on insulation manual