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Hello,We
have a 1930 tudor house in California, all old plaster inside.
Some
rooms had wallpaper, some were painted over plaster. My question is: is
there a method to adhere new plaster without having to use any
plaster-weld
or other modern products containing formaldehyde and other not so
environmental
ingredients? Any old world knowledge? How was it done about 100 years
ago?
Plaster was bonded to plaster 100 years
ago by
chipping the wall with a hatchet or
chisel.
These chips were made generally about
6"
on center. Then, the old wall was
coated
with heavy gauged lime and gauging
plaster
(that is a high percentage of plaster to
lime),
and no retarder(which weakens the
mortar.
I have seen this a lot in old 1800's
buildings.
It wasn't as reliable as plaster weld, and
usually
the new finish coat can be scraped
off.
Even though this method worked, it
couldn't
withstand much abuse.
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