Floor Prep -

[lmkitchens]

Hi guys, Planning a job i have on in a few weeks.

Its an oldish house, and the bathroom floor is roughly 4.7 m x 2.25 m. I have discussed with the customer that the floor boards need to come up. I recommended straightening out the joists leveling the floor etc. So I plan to :

Remove existing boards
Straighten joists
Add noggins where required.
Lay ply, on this length will these need expansion joints? Obviously these will be staggered.

Would I be best Overboarding with Hardie - or - Laying a decoupling membrane on top?

I'm not tiling the job just prepping for my tiler and I got the impression he prefered Decoupling membrane over hardie backer.

Thanks, Luke.

 

[Time's Ran Out]

The decoupling will provide a fully waterproofed room if properly installed and on deflection free substrate.
Good luck.

'am I your father Luke?

 

[lmkitchens]

I hope not 😉

So a decoupling membrane is suitable to fix direct to ply? Using a SPF. I may get my tiler to lay the stuff anyway as long as my floor is nice and flat 😀

 

[Time's Ran Out]

Luke up Ditra by Schluter Systems.

 

[White Room]

The decoupling will provide a fully waterproofed room if properly installed and on deflection free substrate.
Good luck.

'am I your father Luke?

Cool.....