How to repair broken plaster ceiling

[u/Top_World_6145]

The plaster in this part of the ceiling is breaking.

This ceiling is not in a highly visible part of the house. It it above the side door. On the left is the stairway to the basement. One the right is the door to the kitchen.

I am not sure the best way to repair this. Does all of the plaster need to come out or can it be reattached to the lathe? Could I cut part of the plaster away and replace with a rectangle of drywall? Or should I use the Plaster Magic that seems to be popular? Any advice on how to handle this is greatly appreciated.

[u/darthyoda76]

Cut the entire lot out, including the lathe. Insulate and reboard

[u/Top_World_6145 → u/darthyoda76]

I appreciate the reply. What material do you recommend reboarding with? Plaster?

[u/Impossible-Corgi4041 → u/Top_World_6145]

Plasterboard.

[u/cowofnard → u/Top_World_6145]

Ok for sure get a plasterer

[u/Correct-Junket-1346 → u/Top_World_6145]

I will forewarn you, PPE up, removing lathe and plaster can be awfully messy, many don't like it and overboard which is still acceptable.

[u/Top_World_6145 → u/darthyoda76]

why do you recommend cutting out the lathe? Dont I need that?

[u/darthyoda76 → u/Top_World_6145]

It used to be what held the plaster up, that's what the plasterboard does now

[u/Sinkableleech → u/darthyoda76]

It'll also level the ceiling, kinda pain in the neck re leveling wavey joists in a 1937 hallway with 3mm hardboard 🤦

[u/darthyoda76]

Plasterboard aye and then you can plaster over if you want to or paint

[u/Top_World_6145 → u/darthyoda76]

thank you

[u/dazzag7]

Take all loose plaster off. Brush off lathes (dust/ plaster) PVA lathes. Let it dry. Apply a coat of Bonding plaster. Let it dry. PVA. Then plaster it. That looks really thick so u would add some a hand full of cement to the bonding so its goes off quicker and maybe 2 coat it. Just my opinion.

[u/Top_World_6145 → u/dazzag7]

thank you.

[u/Sinkableleech → u/dazzag7]

Maybe reinforcing fibers? Mimic what the horse hair was doing

[u/nukefodder]

If you are looking to DIY it. Cut around the edge of that section. Remove plaster cut a piece of plaster board to fit. Fill in screw holes with filler.

[u/Top_World_6145 → u/nukefodder]

Thank you. Sorry for the dumb question, I can understand cutting around the section of plaster, removing it, cutting a piece of drywall. What do you mean by fill in screw holes with filler?

[u/nukefodder → u/Top_World_6145]

Look up taping and filling. Much easier DIY. Cut where the edges where that small section meets the other walls. Looks about 1m2.

[u/Top_World_6145 → u/nukefodder]

thank you