Never ever use Plaster
weld, link or other
bonding agent on the outside of a
building
on painted stucco or block. IT WILL FAIL.
I have a house built in 1963 where the outside walls
are covered
with stucco (sprayed on, little dimples). I replaced the windows
in the house and there needs to be a lot of patching. One
contractor
said it would look better if the whole building was restuccoed.
The
old stucco has been painted. The contractor said it would hold up
because glue would be added to the stucco mix. Is this
true?
How long would it be expected to last?
Never ever use Plaster
weld, link or other
bonding agent on the outside of a building
on painted stucco or block.
IT WILL FAIL..
I have seen this so many times where the
stucco looked like it was done by experienced
people but was popping off in less than 5 years.
This material works for inside plastering because it
is water soluble.
When wet plaster is applied, the
surface dissolves slightly and mixes with the
plaster.
It won't work for outside stucco because
stucco absorbs water and the plaster weld
dissolves and fails.
To do things right you would want to
sandblast or chip off the old paint and
apply a new stucco finish with
a bonding admixture like flex con
or acryl60.
EVERYTHING WE DID LIKE THIS 10-15 YEARS AGO IS FALLING OFF THE
WALL.
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