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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
 
OP
6

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
 
OP
B

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?
 
OP
B

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.
 
OP
6

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
 
OP
6

6spidermonkeys

my mate has about four litres of everbuild sbr bonding . is this any good its going free
[h=1][/h]
 
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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 https://www.tilersforums.com/forums/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 https://www.tilersforums.com/forums/tile-adhesive/, step 1
Bond HardieBacker® 250 cement board to the masonry walling
using tile https://www.tilersforums.com/forums/tile-adhesive/. Apply tile https://www.tilersforums.com/forums/tile-adhesive/ to masonry walls using a
6mm notched trowel. The tile https://www.tilersforums.com/forums/tile-adhesive/ must fully support HardieBacker
® 250 cement board and the HardieBacker® 250 cement
board is firmly pressed into the tile https://www.tilersforums.com/forums/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 https://www.tilersforums.com/forums/tile-adhesive/!
 

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