What's the best way to tank a plaster wall

[Plumbing Tiler]

Neither did I until I starting digging the other night.
cheers for your help, I will build a small stud wall then fit 6mm hardiebacker which will hold the weight of the tiles and will not protrude too far out of the wall.

thanks again

Hi, I know it's probably not what you want to hear, but with the size and weight of your tiles you would be better off using the 12mm Hardiebacker 500 boards for your wall, the 6mm is usually just used as an overlay onto existing floors.

 

[RBussey]

Cheers for the advice, I'd rather find out now rather than later!
this weekend I'm going to see if I can bed the water pipes into the solid wall then il be able to remove the backing plaster and dot and dab 12mm hardibacker
cheers guys for your advice

 

[White Room]

Dot and dabbing is not an approved fixing method......

 

[Plumbing Tiler]

Cheers for the advice, I'd rather find out now rather than later!
this weekend I'm going to see if I can bed the water pipes into the solid wall then il be able to remove the backing plaster and dot and dab 12mm hardibacker
cheers guys for your advice

Dot and dabbing is really only suitable if you're fixing plasterboard sheets, if you are going to use the 12mm Hardiebacker then it would be best to stick to building a stud wall as you first suggested, and screwing the Hardie onto that, have a look at the website it will explain in a bit more detail and hopefully help you out mate, its JamesHardie | HardieBacker® 12mm Cement Board for Walls, don't hesitate to ask on here again if you are unsure about anything, good luck

 

[widler]

I actually thought, although never done it, u can dot and dab cement boards onto walls with tile adhesive ?

 

[widler]

I actually thought, although never done it, u can dot and dab cement boards onto walls with tile adhesive ?

In tile adhesive i mean powder

 

[White Room]

[FONT=Gotham-Medium+HLMFIK][FONT=Gotham-Medium+HLMFIK][FONT=Gotham-Medium+HLMFIK]This from Hardies pdf taken from there website......

CAN I FIX CEMENT BACKERBOARD USING A DOT AND DAB TECHNIQUE?​

[/FONT][/FONT][/FONT][FONT=Gotham-Medium+HLMFIK][FONT=Gotham-Medium+HLMFIK][FONT=Gotham-Medium+HLMFIK]

No. HardieBacker​

[/FONT][/FONT][/FONT]

[FONT=Gotham-Black+ABPGSQ][FONT=Gotham-Black+ABPGSQ][FONT=Gotham-Black+ABPGSQ]® [/FONT][/FONT][/FONT][FONT=Gotham-Medium+HLMFIK][FONT=Gotham-Medium+HLMFIK][FONT=Gotham-Medium+HLMFIK]Cement Backerboard is not suited to thistype of fi xing application. Please view the masonry wallinstallation instructions.[/FONT][/FONT][/FONT]​

 

[RBussey]

Yes sorry it's not advised to dot and dab hardibacker but instead use tile adhesive and fixtures.

this is what hardibacker say about fixing to brick walls



8. 1. Installation on brick walls
8.1.1 Preparing the substrate
Ensure wall is sound, clean and ready to receive HardieBacker®
250 cement board. At minimum, the rear of HardieBacker® 250
cement board and the masonry wall must be wiped down to
remove all dust.
8.1.2. Fixing sheets with tile adhesive, step 1
Bond HardieBacker® 250 cement board to the masonry walling
using tile adhesive. Apply tile adhesive to masonry walls using a
6mm notched trowel. The tile adhesive must fully support HardieBacker
® 250 cement board and the HardieBacker® 250 cement
board is firmly pressed into the tile adhesive.
8.1.3 Fixing sheets with masonry anchors, step 2
Use 9 pcs (3 rows of 3) ø 6mm x 50 mm masonry anchors with
self embedding head. The masonry anchors are immediately
fixed through the board into the masonry walls holding the
sheeting in place. Do not overdrive head of anchor, it must be
flush with face of HardieBacker® 250 cement board.
Note: Do not dot and dab tile adhesive.

altho it says use the 6mm board I think il use the 12mm board just to be sure for strength, is this method of installing the boards sound right?

cheers for the advice

 

[widler]

[FONT=Gotham-Medium+HLMFIK][FONT=Gotham-Medium+HLMFIK][FONT=Gotham-Medium+HLMFIK]This from Hardies pdf taken from there website......

CAN I FIX CEMENT BACKERBOARD USING A DOT AND DAB TECHNIQUE?​

[/FONT][/FONT][/FONT][FONT=Gotham-Medium+HLMFIK][FONT=Gotham-Medium+HLMFIK][FONT=Gotham-Medium+HLMFIK]

No. HardieBacker​

[/FONT][/FONT][/FONT]

[FONT=Gotham-Black+ABPGSQ][FONT=Gotham-Black+ABPGSQ][FONT=Gotham-Black+ABPGSQ]® [/FONT][/FONT][/FONT][FONT=Gotham-Medium+HLMFIK][FONT=Gotham-Medium+HLMFIK][FONT=Gotham-Medium+HLMFIK]Cement Backerboard is not suited to thistype of fi xing application. Please view the masonry wallinstallation instructions.[/FONT][/FONT][/FONT]​

thats all well whitebeam ive read loads on here about 'its fine to fix cement boards to walls with cement adhesive but not dry wall adhesive'


in fact the more i think about it the more daft it seems that they say you can't dot and dab with tile addhesive:annoyed:
if your can dryline a wall(plasterboard) then tile it,why can't you dryline a wall(hardi) and tile it,seems odd really.

 

[White Room]

I just follow the manufacturers instructions but on saying that I did see couple of Hardie boards put up with dry wall adhesive once and were'nt coming off that easy.