My 1st Job Hardiebacker confusion

[Flintstone]

Ahh. I’m not too familiar with the hardie backer ways but no more ply you can dot and dab 6mm. I can’t see why hardie is any different

 

[One Day]

If space is limited for building out, you might as well stick with the hardie backer dot and dabbed as its 6mm thick and not 20mm like impish suggested. You can actually dot and dab with 12mm thick wedi type board tho.

20mm for spotting on walls. If you use thinner, there's zero come-back. Wedi, Delta, Jackon - all say 20mm
https://www.wedi.de/fileadmin/media...Building_boards_-_interior_GB_2015_SCREEN.pdf
(page 16)
As for 6mm cement board on walls... not for me thank you!

 

[Flintstone]

Not for me either. It’s the lowest build up way tho if he is tight for room.

My mistake, I’ve been overboarding a lot of stud work with 12mm boards recently. Although tilefix, where I get some stuff from suggest you can use 12mm dot and dab

Dry Lining With Marmox Multiboard - https://www.tilefixdirect.com/blog/2015/01/dry-lining-with-marmox-multiboard/

 

[One Day]

Ah, marmox is one manufacturer I've never used.
I know their coating is a little tougher than others, maybe it helps?

 

[Flintstone]

Maybe it does help, maybe there more confident to say 12mm is fine. 12mm is pretty rigid, I can’t imagine it causing any issues. I find the coatings can be quite inconsistent on various board manufacturers boards.

 

[Dan Fitchie]

I'm going to try and get hold of some Marmox but I've not found a local stockist so far. Short of that will there be a massive difference to using a tanked moisture resistant plasterboard?

 

[Bond]

No problem using plasterboard. (Cheep as chips.)

 

[Perry]

Just normal plasterboard will do.

 

[Dumbo]

What tiles are you using