tilling over hardwall in bathroom

[6spidermonkeys]

to all
can anyone tell me if its ok to tile over hardwall plaster which is going to be wher the new shower will be .the area is about 2.5 high and 600 wide .should i just hack it off and sand and cement it. or am i just being paranoid. cheers

 

[6spidermonkeys]

the rest of the wall is a combination of finish plaster and sand and cement ,plus the area where the shower is to be fitted is wbp ply cheers alan

 

[Bubblecraft]

Bal SBR mate. What size of tile are you using?

 

[Bubblecraft]

When you say "Sand & cement" is this an area that was recently done or is this an old scratch coat from under blown plaster?

 

[6spidermonkeys]

400 x 250 x 7mm ceramic cheers alan

 

[Bubblecraft]

If your sand/cement area is a smooth finish, you can use the SBR. If its a rough scratch coat or a bonding coat, this will need a skim or re-sheeted before applying an SBR coat.

 

[6spidermonkeys]

cheer for the info mate .will try and hack off hardwall at the weekend .should have trusted my instinct in the first place and used sand/cement .nevermind its all a learning curve.cheers mate.ps cant use dot and dab only have 10mm from wall to existing render line

 

[6spidermonkeys]

my mate has about four litres of everbuild sbr bonding . is this any good its going free
[h=1][/h]

 

[Bubblecraft]

Can't speak for Everbuilds own brand. I'd only use Bal SBR. May want to ask around. If you have only got 10mm, I'd use a bonding to bring it out & use a finishing plaster. Other option would be to use 10mm hardi-backer & bed onto tile adhesive (cement based). Guidelines below:

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!

 

[ASandOW]

Why can't you tile over gypsum products?

 

[Dongrand]

Why cant he just leave the hardwall up?