About 6 weeks ago I had about 2 square meters of my kitchen wall
replastered. The original layer of plaster was hacked off and the new layer
applied was about 5mm thick. It has almost dryed out except for a patch
about 50cm across, which is still a dark cement like colour. It does'nt
seem to want to dry. This morning I put a hairdry onto one part of it and
kept it there for about 3 minutes. It made no difference to the color.
However, I was still sure it was related to water so I put a very hot
electric iron up against the dark bit and to my surprise water trickled out
from under the iron (not a steam iron :-) ). When I lifted the iron off
after about 2 mins the plaster was almost white. I seemed to have got rid
of a lot of water. Is there something wrong with the plastering or am I
just being impatient?
I don't think you're being impatient. There must be some reason why there is
still water in the wall. It must be getting in from somewhere. I would
expect it to be normal pink colour within a week, depending.
Why did you have it replastered in the first place?
Was the plaster coming off?
Was it already permanently wet?.
Is it an outside or inside wall?
It was coming off the wall or sounding hollow. Underneath it is another
layer of plaster which appears to be fine, beneath this is an artexed wall.
This is all in a kitchen where the roof had been very leaky for many
months. The roof and the plastering were done at the same time.
It sounds as though the wall is 'full' of water and may take time to dry
out, assuming that the roof is now OK. Possibly removing and replacing the
plaster has caused a channel which ducts the water to one spot on the
plaster, whereas before it spread over an area and was not so noticeable.
Just a theory, though.
Make sure the roof's definitely OK and wait until the weather has dried
cracks. They are'nt a big deal though. I have put an eelctric heater up
against the wall to see what happens. Your theory might be right about the
wall holding water. Since fixing the roof there has been a lot or rain at
times which has not been acompanied by worsening of the damp patch so I
doubt if more water is coming in.
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