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A

Alexb

Please checkout the following advertisement.
Hi, does hardierbacker in bathroomneed to be primed before tile?
 
OP
O

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.
 
OP
A

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
 
OP
S

Stef

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

image.jpeg
 
OP
A

Alexb

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

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.
 
OP
O

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!
 

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