Tiling Dilemma With Damp Wall Substrate

[Unused Account 1]

P4ulo ,good advice ,ive done this a couple of times over the years ,just hired a de humidifier ,it solved the. Problem

 

[mika_98]

I like the idea of using No More Ply boards. A decent board for a reasonable price.
Assuming if I go with the dot/dab then screw in process, the idea would be to let the adhesive set and then screw in?

Not sure how much damp remains to be honest, its down to bare brick. Could always get someone in to check with the damp meter again. As for the dehumidifier, that's something I was considering so thanks for the reminder.

 

[Unused Account 1]

If its down to brick. Heat will dry the bricks out ,then youll see if its coming in from the outside.

 

[p4ulo]

@mika_98 - you screw whilst the adhesive is setting, so it squidges down tighter....

 

[Old Mod]

@mika_98 - you screw whilst the adhesive is setting, so it squidges down tighter....

Surely p4ulo u'd knock it out of plumb that way, u make sure it's bedded well, plumb and level it then mechanically fixed once dry?
Unless I'm doing it wrong?

 

[mika_98]

Sorry if this sounds silly but I assume this means pre-drilling holes for the plugs and screws. Is that correct?

Been looking at No More Ply boards. The process on their site advises to use a 'Mega Strength Adhesive' on the joins. Is that an absolute requirement?

 

[Unused Account 1]

Keep away from all that ,just go in when ready to tile ,dont tke chances ,only as good as last job

 

[p4ulo]

Surely p4ulo u'd knock it out of plumb that way, u make sure it's bedded well, plumb and level it then mechanically fixed once dry?
Unless I'm doing it wrong?

I personally like to screw it down whilst its going off, ok - maybe doing it til it squidges is a bit much, but using my level at the same time I ensure its still flat once fitted.

 

[p4ulo]

Sorry if this sounds silly but I assume this means pre-drilling holes for the plugs and screws. Is that correct?

Been looking at No More Ply boards. The process on their site advises to use a 'Mega Strength Adhesive' on the joins. Is that an absolute requirement?

Yeah, you will need to pre-drill and rawl-plug before fitting the board.
Dunno about No More Ply boards, I'm a HardieBacker man meself, cos I get it cheap at Topps.

 

[Doggit]

Damp bricks take about a month per inch to dry out. If you're down to bare brick, then the normal way would be sand and cement with a waterproof render in it, but you should use a washed sand. The drawback is it'sll take a few weeks to dry. If you want to get on with the work quickly, then you could go for the Dryzone system. Not cheap, but you can get the plasterboard up in a day. Last method to think about, is to blackjack the wall to stop the damp coming though, batten the walls using tanalised timber, and stainless steel screws, then plasterboard - but make sure the blackjack goes on the ground as far out as the plasterboard will go.