Back to The Brickwork Or Layer Plaster Back Up?

[MrMiller]

Hi Folks

I'm redoing our upstairs bathroom and got some good advice last week re what I believe is a lath and plaster wall.

Here's another wall in the bathroom:-

This time when I was removing the tiles they came off for the most part with the second coat of plaster. You can see for the most part the keyed first coat has remained solidly in place, except that is for the top right where it's come off back to the brick.

My question is - Should I fill that top right part and then reapply a second coat over the lot? Or am I as well knocking the lot off and just applying new boards directly on to the brickwork?

 

[Wayners]

Lath is wood.

Do you have wood behind or a brick wall?

 

[MrMiller]

Lath is wood.

Do you have wood behind or a brick wall?

The lath and plaster was another wall. This one has brick behind the plaster - You can see some brick in the top right hand corner where the plaster has fully come away. Otherwise that first keyed coat is pretty solid across the rest of the wall.

 

[Wayners]

Knock off plaster and use foam to stick on insulated plasterboard with a few mechanical fixings is one option

 

[MrMiller]

Knock off plaster and use foam to stick on insulated plasterboard with a few mechanical fixings is one option

Thanks. I'm not sure if it would specifically need to be insulated plasterboard as that wall is internal and backs on to a bedroom. Not sure if it does anything harm though?

Here's a picture of the wall which does face the outside (you can just see where I've knocked the tiles off on the right hand side:-

I'm not too sure whether I should even try taking these tiles off or just put bathroom wall panels over the top? The bath sits along that wall so would definitely need moisture control at the back if I did knock them off.

I'm no expert but I think it's a backer board they're attached to. Here's the exposed bit on the left close up:-

So I'm not sure if I gain anything here by taking these titles off unless they'd come off cleanly leaving the board behind but I don't think that'd be the case...

 

[Wayners]

Ah.
Just foam some plasterboard on and skim then