If you want your plasterer to apply a fresh skim coat to old plaster walls, you will need to ensure any damaged old plaster will need to come off first. And then clean off the brickwork beneath and then your plasterer can apply a skim coat.
Yes, you can plaster skim over paint however, if the paint is in poor condition or the wall has recently been painted it is best to avoid plastering over the paint directly.
Plaster and/or dry lining walls and ceilings have an expected life span as long as 70 years and a minimum of 30 years.
Plaster is more sound-proof, but using drylining a wall usually means better insulation. A dense material, plaster blocks sound transmission. However, even though plaster is denser, it can't beat the thermal capabilities of standard drylining coupled with modern insulation commonly found today.
Skim plaster can be applied to an existing plaster finish, or it's used to cover plasterboard.
Skimming a wall is a plastering technique which involves applying a thin coat to walls to create the smooth surface required for painting or decorating.
It is always best to attach coving or cornice after the room has been plastered. If you change your mind in the future and remove either the coving or cornice you won't be left with an unplastered area.
If the old plaster is damaged or crumbling then it should be removed in advance of applying new plaster.
Colour pigment can be added to the plaster during the mixing stage. This ensures that the colour is distributed throughout the plaster.
We would advise you to wait at least one week before painting onto new plaster however it may take longer than this, sometimes up to one month if the plaster has not dried.