What type of plaster is this and how can i fix it??

[z3usx]

Hi

Just started trying to repaint my kitchen and i realised that there are a couple of spots where the plaster has come off exposing the brick work.

One area is damp (near the window) and the other area is perfectly dry.

On closer look, the remaining plaster surrounding it, is like sand (just crumbles like a powder) and the layer is around an inch thick (from brick work to finished wall). Now i was going to use patching plaster, but considering its looseness, i don't think it will adhere.

The remaining wall seems solid and sound, but i would really like to patch these areas up before i paint. The house is an ex council and around 35 years old.

Any ideas?

 

[roughcaster]

I know the kind of plaster you mean.As you say it is very sandy and dry,even your fingers will rub it away from the wall.By using a stanley knife,you can cut in deeply all around the patch back to the brickwork, say 5"/6" away from the damaged area and then break away the plaster, back to the cut you have made with your stanley knife.Brush away all the dust without disturbing the edges.Give the whole area a good soak with a wet brush,put on some PVA with your wet brush,and then plaster out the patch with Bonding Coat plaster.It is a good idea to have your plaster made up and ready, so that it is put straight on to wet and glued patch.Let the Bonding coat set,(2/3hrs) and then finish with Multi finish plaster.Sometimes,this kind of old plaster if it is really bad,is better being boarded over, or alternatively,take all the old plaster off(dirty job) and replaster it.

Roughcaster.

 

[z3usx]

Hi, i actually put some patching plaster over it to see if it hold and when it dried it seems pretty sound and solid. Just got to build up the layers yet.

If it comes out i will do what you mentioned (wish i read your reply before i used patching plaster). Hopefully what i've done is good enough for a temporary fix until i can afford to redo the kitchen walls.

Thanks for your reply.