Any use for stale plaster?

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Any use for stale plaster?

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Hairyloon

Joined: 20 Nov 2008
Posts: 15425
Location: Today I are mostly being in Yorkshire.

Posted: Wed May 15, 13 3:57 pm Post subject: Any use for stale plaster?
I may have asked this before as it seems to keep coming up, but I've got half a bag of plaster that has been sitting around for too long to be useful. I'm tempted to throw it on the walls in the basement since they are so rough that anything would improve it, but it's finishing plaster, so I think that would not work well.

vegplot

Joined: 19 Apr 2007
Posts: 21301
Location: Bethesda, Gwynedd

Posted: Wed May 15, 13 4:24 pm Post subject:
You have asked this before.

Hairyloon

Joined: 20 Nov 2008
Posts: 15425
Location: Today I are mostly being in Yorkshire.

Posted: Wed May 15, 13 5:27 pm Post subject:

vegplot wrote:

You have asked this before.

Ah yes... and the answer was "no" which is why I did not remember it.

The search engine seems to have a habit of not working, so I have a habit of not using it...

Ty Gwyn

Joined: 22 Sep 2010
Posts: 4613
Location: Lampeter

Posted: Wed May 15, 13 9:17 pm Post subject:
Old plaster was often used for filling big cracks or filling in after chasing out for pipes ,wiring etc,mix 3 to 1 with sand.

cassandra

Joined: 27 Mar 2013
Posts: 1733
Location: Tasmania Australia

Posted: Thu Jun 06, 13 9:24 am Post subject:
I have used it as a fill between paving stones (crazy paving) when buying builders sand sounded too expensive... Keeps the weeds down too due to the high lime content.

Hairyloon

Joined: 20 Nov 2008
Posts: 15425
Location: Today I are mostly being in Yorkshire.

Posted: Thu Jun 06, 13 2:54 pm Post subject:

cassandra wrote:

Keeps the weeds down too due to the high lime content.

Is it any use for improving acid soils?

cassandra

Joined: 27 Mar 2013
Posts: 1733
Location: Tasmania Australia

Posted: Fri Jun 07, 13 6:55 am Post subject:
Couldn't say for sure, not knowing the chemical side of things, but in moderation it wouldn't hurt.

Mistress Rose

Joined: 21 Jul 2011
Posts: 15996

Posted: Fri Jun 07, 13 7:00 am Post subject:
It may do, but I would go easy in case some of it is still active. Don't apply where plants are present as if any reacts, it will burn them. We buried a lot of old plaster (about 100 years old) under some borders in our first house. We managed to grow azaleas on top by feeding them with tea leaves, so I don't think that was very alkaline.

Hairyloon

Joined: 20 Nov 2008
Posts: 15425
Location: Today I are mostly being in Yorkshire.

Posted: Fri Jun 07, 13 9:55 am Post subject:

cassandra wrote:

Couldn't say for sure, not knowing the chemical side of things, but in moderation it wouldn't hurt.

I could be really drastic and get scientific about it: do a soil analysis before and after measured quantities of plaster...

onemanband

Joined: 26 Dec 2010
Posts: 1473
Location: NCA90

Posted: Fri Jun 07, 13 5:10 pm Post subject:

I couldn't comment on pros/cons of putting it in your soil, but a few thoughts..

Gypsum waste is now banned from landfill because it gives off hydrogen sulphide when mixed with biodegradable waste.

Page 3 section 2 tells you whats in it ......
https://www.refina.co.uk/webpdfs/Info_docs/British_Gypsum_info_multifinish_plaster.pdf

Personally I'd loose it in a load of hardcore that I was tipping or loose it among hardcore for a base.

Mistress Rose

Joined: 21 Jul 2011
Posts: 15996

Posted: Fri Jun 07, 13 8:52 pm Post subject:
That does sound a better idea.

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