Attaching dry-wall to plastered brick -- remove plaster?

The plaster, layered about 1/4" thick, is old (1948), and is reportedly of a "weaker" composition (they were saving materials back then). It's painted over, but I've removed paint in some places to sample the plaster behind. Its bulk is porous and crumbles easily, and a bit of sand comes off when I run my finger hard over it. There's good brick behind the plaster, two of the four walls are exterior walls. The room is small enough I need every inch I can get out of the available space, which is why I am considering gluing the panels and not going for any framing. But if I am to glue the panels, should I not remove the plaster? Otherwise the panel hold is only as strong as the plaster is attached to the brick (read: I am worried about this part), regardless of how well my glue holds the panels to the plaster? The room is on the second floor in an older apartment building, I am doing sound insulation in the bedroom. submitted by /u/panorambo [link] [comments]

Jun 3, 2025 - 09:52

The plaster, layered about 1/4" thick, is old (1948), and is reportedly of a "weaker" composition (they were saving materials back then). It's painted over, but I've removed paint in some places to sample the plaster behind. Its bulk is porous and crumbles easily, and a bit of sand comes off when I run my finger hard over it. There's good brick behind the plaster, two of the four walls are exterior walls. The room is small enough I need every inch I can get out of the available space, which is why I am considering gluing the panels and not going for any framing. But if I am to glue the panels, should I not remove the plaster? Otherwise the panel hold is only as strong as the plaster is attached to the brick (read: I am worried about this part), regardless of how well my glue holds the panels to the plaster?

The room is on the second floor in an older apartment building, I am doing sound insulation in the bedroom.

submitted by /u/panorambo
[link] [comments]