Preparing for Plastering/Skimming

KarenN · 23 Mar 2010

Any advice would be good....

My 1920's bungalow is going to be plastered. Most walls are solid so I guess will just need a skim over. However, in places the wall feels hollow and if I tap that area the plaster falls away.

In order for the new plaster to last, and I want it to last a long long time!!! is it best just to knock out all these hollow spots completely OR (as my Dad wants to do....) take off all existing plaster right down to the breese blocks, as he says this way the plasterer will make a much better job?!?!

Karen

1john · 23 Mar 2010

well your dads way should definatly by the way to go and guarantee the work to be good for a long long time (tradesman dependant).
The other way could be fine too, unless the old plaster is blown elsewhere or other bits blow out afterwards.

I am assuming you have black mortar rendering with a white top coat?
I dont think your house will be made of brreeze blocks either.

PrenticeBoyofDerry · 23 Mar 2010

A complete knock off, is always best if time and cost allows.
You could well knock off the loose stuff and patch it, but you will be running the risk of the rest one day soon being in simular condition, and all the mess will start again.
So do it all.

Micilin · 23 Mar 2010

I'd do the same, get it all off if at all possible - if the old stuff will come off without damaging brick/block work too much.

dextrous · 23 Mar 2010

A trowhawk is an excellent tool for scraping old plaster off.

roughcaster · 23 Mar 2010

dextrous said:
A trowhawk is an excellent tool for scraping old plaster off.

So is a garden hoe.

Micilin · 23 Mar 2010

roughcaster said:
dextrous said:

A trowhawk is an excellent tool for scraping old plaster off.

Click to expand...

So is a garden hoe.

Are they gnomes on the game?

dextrous · 23 Mar 2010

I still prefer my trow-whork

KarenN · 24 Mar 2010

I am assuming you have black mortar rendering with a white top coat?
I dont think your house will be made of brreeze blocks either.[/quote]

The plaster that is coming off is about 1/2" deep and beige coloured. The residue left on the grey 'breese' blocks (that's what they look like to me - the inner wall of the cavity wall) is just powdery and brushes away.

Sometimes the blocks get chipped away which worries me - is there a way around this? I don't won't to damage the walls before plastering?

Thanks for any help! Karen

roughcaster · 24 Mar 2010

Don't worry about minor damage to the blocks, (chips, small gouges etc), you can't avoid things like that. As long as you don't hammer too hard and damage the actual structure of the blocks themselves, (cracking/breaking them, loosening them etc.

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Preparing for Plastering/Skimming

dextrous

dextrous

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