Hardiebacker fixing?? - Hardiebacker Advice

[Unregistered]

Hi. I would usually fix hardibacker with stud but I can't in this case as the boards will come out to far over the already fixed shower tray. So my question is 'Can I fix them with tile addy and if so whats best to use? Cheers in advance Ross

 

[grumpygrouter]

Hardiebacker in my experience is not flat and requires mechanical fixing to help pull it straight.

 

[bigandy]

i'm with grumps but know there is a hardi rep /tech on here somewhere

 

[nickj]

Hi Grumpy,

Can i ask what you mean by mechanical fixing?

Cheers,

Nick

 

[bigandy]

i can answer for grumps(i hope thats ok grumps). he simply means screws which will pull any slightly curved boards back in line with studs whereas an adhesive would only stick it in the shape of the board

 

[Unregistered]

ok thx for advice guys.

 

[Alberta Stone]

I know that PL premium is a good adhesive for sticking CBU (it is a polyurethane subfloor adhesive and comes in the large format caulking tubes).
I typically use it on the corners as it is waterproof and strong.
Down side is the long drying time, although it will adhere to damp or even wet materials.
I also run a bead on the stud if there is no vapor barrier as it bonds the board really tight when used with screws.
When dry the job rings like a bell when tapped rather than rattle.
You should use spf when bonding it as a subfloor.

 

[cam_low]

does it need adhesive as well as screwing down? can it be tiled straight away ?

 

[malcolml]

hardi-backer say glue and screw and you can tile straight away they say 6mm for floors when used with 2part flex and 12mm for walls..send for fixing guide or
e-mail www.JamesHardieEU.com
free phone 0800 068 3103 for tech

 

[marc1106]

hey malcolml 6mm on floors and 12mm on walls, sounds back to front doesnt it :santa_cheesy: