How to make good the areas behind the radiators?

[jamiegw]

We removed the "brick" tiles behind these radiators and want to make the wall good and wallpaper before putting the radiators back. In a couple of areas the plaster has blown from the brick work. Mostly however the plaster is still good.



As we aren't painting, the finish doesn't need to be super smooth.

Should we remove all the existing plaster and hire a plasterer? Do plasters also remove old plaster if required?

 

[motorbiking]

Depending on the thickness you could put some insulated plasterboard on "glued" with plasterboard foam. Or if its too thin, just the regular PB and then tape and skim the joins.