I'm looking to get some advice on best way to repair a wall in my mother-in-laws home. It's a older brick ranch. There are not triditional studs and insulated walls. They replaced their window and had some leaking. The water got behind the wall and the plaster started to bubble in places.
It looks like there may have been a previous poorly done repair so I want to make sure it's fixed right and lasts. The leak in the window has been fixed. How would you repair this?
attached are pictures