Hardiebacker - Tile Advice

[Alexb]

Hi, does hardierbacker in bathroomneed to be primed before tiling?

 

[One Day]

No it doesn't. Please say it's not in a wet area?!

 

[Alexb]

No it doesn't. Please say it's not in a wet area?!

It is in wet area. Is that a problem?

 

[One Day]

It's not waterproof. Absolutely pointless putting hb in a wet area. If you want it waterproof, you'll have to tank it now. Hb is mis-sold as suitable for wet areas. What it does is allow water to pass through to the background.

 

[Alexb]

It's not waterproof. Absolutely pointless putting hb in a wet area. If you want it waterproof, you'll have to tank it now. Hb is mis-sold as suitable for wet areas. What it does is allow water to pass through to the background.

I thought it was waterproof, heard a lot about it. If that is the case, then it is better just to usetanked plasterboard

 

[Kyle Knowles]

Water safe not waterproof meaning water don't make it deteriorate

 

[Stef]

Hardie in a shower I've just completed.
It needs tanked to be waterproof.

 

[Alexb]

Tanked plasterboard is waterproof, and if hardiebacker also needs to be tanked, what is the difference between them, apart from the price?

 

[hmtiling]

Tanked plasterboard is waterproof, and if hardiebacker also needs to be tanked, what is the difference between them, apart from the price?

hanging weight

 

[One Day]

hanging weight

Which when tanked comes right down.
No way a paint on system can take the full quota.
You would have to use a membrane such as Kerdi.

 

[hmtiling]

Which when tanked comes right down.
No way a paint on system can take the full quota.
You would have to use a membrane such as Kerdi.

surprisingly some tanking kits say they don't alter the substrate's hanging weight. @Paul C. posted something about it a while back. i think ardex's one was one if memory serves.

 

[White Room]

I only put Hardie on walls (which is rarely) if the tiles are heavy.

 

[Alexb]

I only put Hardie on walls (which is rarely) if the tiles are heavy.

Thanks everybody for the comments, will stick with tanked plasterboard.

 

[One Day]

surprisingly some tanking kits say they don't alter the substrate's hanging weight. @Paul C. posted something about it a while back. i think ardex's one was one if memory serves.

I know - I remember the post but I am pretty confident I can "peel" ardex wp off hardibacker.
I'm a big fan of ardex wp but I can't believe the claim - sorry!

 

[Sean Kelly]

Does not need to be primed but I would advise you to wipe it down with a damp cloth just to wipe off dust. It will dry in a matter of seconds.