we have been filling in where the electrics have been channeled out in the
plaster work and other holds in the plaster work. Having applied hardwall
to these areas some of them have developed hairline cracks and small like
cracks between the new undercoat plaster and the old plasterwork. Will it
be ok or will it need to be re-applied? and what could i do to stop it
happening again. We pva's the brick work. Next month the plasterer will be
coming in to re skim all the walls. help!!!!
It doesn't matter. It happens because plaster shrinks as it sets.
Large volumes of plaster will always hairline crack. The finish coat
is applied thin so that when it shrinks it does this mainly by getting
thinner. (If hairline cracks appear as finish coat sets, that means it
was put on too thick.)
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