Hardie Backerboard and then Tank?????

[Tricks13]

If a downstairs shower has been lined with Hardie Backerboard is it necessery to still tank or just go ahead and tile?

[wetdec]

Can tile it but need to tape the joints first and make sure you have a good seal to the base


tiler

..

[Holohana]

spot on but you could tank for belt and braces but you dont have to providing you have a good seal on all joints.

[aflemi]

spot on but you could tank for belt and braces but you dont have to providing you have a good seal on all joints.

I appreciate this is not a current thread but I have read differing opinions on tanking hardibacker. My situ is........ I have to build a stud wall which I am doing with 4x2 timber and 12mm hardibacker. This wall will have a shower mixer and head over a bath. Shower is for regular domestic use. Tiles will be 450 x 330 ceramic, adhesive is BAL Wall + Floor Professional. If I don't tank, what is the best way to seal edges and corners, would it be wp1 polyester tape with a covering of tanking or are there any other suggestions?

[aflemi]

I appreciate this is not a current thread but I have read differing opinions on tanking hardibacker. My situ is........ I have to build a stud wall which I am doing with 4x2 timber and 12mm hardibacker. This wall will have a shower mixer and head over a bath. Shower is for regular domestic use. Tiles will be 450 x 330 ceramic, adhesive is BAL Wall + Floor Professional. If I don't tank, what is the best way to seal edges and corners, would it be wp1 polyester tape with a covering of tanking or are there any other suggestions?

Any help guys/gals?
Any pointers gratefully received..........

[whitebeam]

You could use silicone but if your thinking of using wp1 for the corners then you may just well do the lot with it

[ph121]

question on hardiebacker....
is it possible to fix to brick/bonding/finish plaster wall
using tile adhesive or plasterbord adhesive?

also am i right in assuming hardibacker and aquapanel are essentially the same?
thanks

[aflemi]

[quote=ph121;233637]question on hardiebacker....
is it possible to fix to brick/bonding/finish plaster wall
using tile adhesive or plasterbord adhesive?

I'm sure you can but then you are adding the weight of the hardibacker to the total recommended load of 20kg/sqm which is pretty impractical, unless tiles are made of balsa wood........

also am i right in assuming hardibacker and aquapanel are essentially the same?
thanks[/quote

Not 100% sure but aquapanel is waterproof while hardibacker is waterresistant, sure others on here have more knowledge of the differences, though.........

[Dave]

You can fix hardi 250 over skimmed/block walls if you need to..