coal plaster

[johnu]

About to remove wallpaper from interior wals of Victorian hse; have been told consists of coal plaster.

Plse can anyone tell me what this is and how to recognise.

What prep do I need to do prior to painting.

Grateful for any advice

 

[JohnD]

Grateful for any advice

don't believe everything you're told.

 

[roughcaster]

I've never heard of coal plaster either,although that doesn't mean anything. Does the plaster look dark as if it could have had say, coal dust mixed through it years ago?

Roughcaster.

 

[iaith]

I know that the grey plaster used on laths has lots of coal dust in it, or at least in Wales it dose, but it would be coated with a white top coat. If you have exposed undercoat plaster I would pva it then fill with filler or maybe re-skim.

 

[johnu]

Thanks for advice;

With a little more research, believe fine coal dust was mixed.
You were correct about its usage in Wales and also Yorks.