Q: What is a fog coat?
A: A fog coat is a light application
of a cement-based slurry, the same proportions of cement, lime (if
any), and water as used in the original application minus the sand,
used to even out a surface’s appearance. It is typically sprayed
or rolled onto the surface, similar to painting with a cement-based
paint. Fog coating improves the look of stucco without changing
its ability to transmit moisture vapor.
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