Info on Stucco and Plastering-November, 2014 - fortieth issue
Slate (or flagstone) chimney shoulders
Hello, I found pictures of slate chimney shoulders on
your website and I am very interested in this
for a new stucco chimney I am doing. I was wondering if you
use any kind
of flashing between the house walls and the stone, or if the
stucco goes right on top
of the stucco and abuts the house wall ?
I found it impractical or impossible to
flash these shoulders against the house, so we butt the stone
tight to the existing house or the
brown coat.
Usually the existing house has an exterior material, so that probably isn't too important. Also, water runs downhill, so where the stone butts to the house is at an angle, and doesn't matter much.
It is critical that there is flashing over the the edge of the stone that butts the chimney. Then the flashing is stuccoed over.
I'm glad you like the stone chimney shoulder idea.
I copied the stone shoulders from the houses in Chevy
Chase, a town in Maryland and an area of Washington, DC.
A lot of the old chimneys in Chevy Chase were done this way.
Most old stucco or brick chimney shoulders
are deteriorated, but the stone shoulders are
still in good shape after 100 years.