Another question. If we do find a source of moisture and mitigate that, should we remove all the existing plaster and start fresh or can we scrape off what’s flaking and add more on top? Is there some sort of barrier coating we should add between? Thanks again.
It’s in the middle of the house, not against an exterior wall. We have the same cornice in the bathrooms with showers with no problem. There is air conditioning duct in the attic above, nothing else. Could that produce enough condensation to do this? Thanks for all the input.
It does look like water damage, but there are no pipes above it and no water damage or staining on the wall or ceiling. We’ve looked in the attic and it’s dry above.
The cornice was not a prefabricated moulding. It was run in place with plaster and a profiled mould.
I’m wondering if there...
Hi. We had a new house plastered— walls, ceilings, and cornice— 17 years ago. It was done by an older plasterer who came out of retirement for the job. He did beautiful work and it has worn well except in one spot.
A year ago a section of cornice over the stairs began to blister and...
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