Has anybody on here dealt with this? From what I've read it looks like the area needs re-plastered, but is their any other options? I've came across this https://www.permagard.co.uk/salt-neutraliser-5-litre , although no idea if it would work. The affected areas only around 150mm x 100mm, and has barely worsened over the last couple years.
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Thread: Hygroscopic salts in plaster
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07-06-2018 04:06 PM #1
Hygroscopic salts in plaster
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07-06-2018 05:36 PM #2
I'm not an expert so I might be wrong but do you not normally suffer from this if there's a leak or water ingress from something like poor pointing/grouting. If so, has that been remedied first?
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07-06-2018 06:24 PM #3This quote is hidden because you are ignoring this member. Show Quote
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07-06-2018 07:38 PM #4
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You could also get a damp meter to check the affected area, if there is no dampness you should probably be fine. Try sanding it down and painting of its dry.Last edited by beensaidbefore; 07-06-2018 at 07:44 PM.
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08-06-2018 09:47 AM #5This quote is hidden because you are ignoring this member. Show Quote
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08-06-2018 02:53 PM #6
My understanding is it takes a small amount of water traveling through to cause the minerals/salts to bloom.
Hopefully it's a historical case and you have no further dramas but chimneys are notorious for leaking water, usually because the pointing has failed with time and in older buildings it can be difficult to weatherproof with traditional methods.
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08-06-2018 03:05 PM #7This quote is hidden because you are ignoring this member. Show Quote
I contacted the company offering the salt neutralizer and they said it was suitable but not a guranteed solution. I may give it a go as its pretty cheap and a lot less hassle than getting the area replastered.
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