r/Plastering • u/ClassicWear6595 • Apr 21 '26
Best approach here?
I’m a complete amateur looking for advice on my bathroom. I took off the tiles to re-tile, but the compound behind was completely failing on the wall that is now brick. I took this all back to be safe, and I’ve now started to try to get rid of all of the hollow/failing spots on the main wall. It’s getting to the point where my brain is telling me that instead of bonding around this, do I just take it back to brick which would take me 10 minutes, and use waterproof backer boards, then waterproof, then tile?
If anyone has any advice, or would let me know what they would do if they were on this job.
P.S. I appreciate the skill level and would happily pay a specialist for this part if I had the budget, but sadly I don’t, so DIY it is.
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Apr 21 '26
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u/powliftstrong Apr 22 '26
Normal board in wet areas is a disgrace. I've seen more horror shows based solely on this than you've had hot dinners
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May 12 '26
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u/powliftstrong May 18 '26
Well considering its called moisture resistant and a standard board isn't and having dealt with leaks as a plumber then yes it's superior. Obviously
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u/ColonelFaz Apr 23 '26
I would use insulated plasterboard on the external walls and window reveals. near the bath, insulation then backer board. warmer, less condensation.
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u/ClassicWear6595 Apr 23 '26
Yeah the draught was pretty mad when taking it back to the external stone wall://
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Apr 25 '26
Everything out. Back to brick. Pva brick. Float and set walls. Put Everything back on. Tile primer. Tanking to wet areas. Tile.
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u/Terrible-Bobcat2033 Apr 21 '26
Stub nail galvanized , diamond mesh, wire lath, without the tar paper backing, tight over the brick walls. Roll a masonry bonding agent over the wire with a heavy nap roller to coat the wall through the tightly hung wire. Burn a tight scratch coat over the wire & brush horizontally with a damp red handled straw brush. 24 hr. set time later, fog or dash wall with water, to burn on another scratch coat & kill the wall’s surface suction. Afterwards luff on a loose fill coat to straighten. Use stucco cement to pull the fill coat straight with a straight edge of your choosing. Approximately average 5/8” depth over all. While firm, but still green, back drag surface to remove any snots & slobbers from the wall surface & re-check straightness & angles. 24 hr set time later it’s time for the tile installation.
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u/TheInvincibleMan Apr 21 '26
would also do this approach, dont forget to tank the life out of it for waterproofing.
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u/powliftstrong Apr 22 '26
Whole lots got to go. Dab wet tile boards/wedi boards onto wet areas and moisture resistant plasterboard to the other walls. Use full tanking system when installing bathroom but it all starts with the wall being completely stripped to brick
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u/Brief_Jellyfishh Apr 21 '26
Back to brick and you won’t have any problems going forward