Bricks, Masonry, Asphalt and Concrete - Stucco over cinderblock retaining wall and moisture
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richmondhill
09-21-07, 02:01 AM
I want to stucco over an old and well-built cinderblock retaining wall. I am concerned about moisture building up behind a portland cement-based stucco application and wonder if I should use a lime-based stucco material. Does anyone think that this is an issue, moisture not being able to pass through the portland based stucco and whether or not a lime-based stucco would be better?
marksr
09-21-07, 06:29 AM
Welcome to the forums
Usually stucco is painted to protect it from moisture infiltration but since this is a retaining wall, the moisture needs to be stopped at the back side! I'm a painter not a mason but I know an unsealed backside on a retaining wall will mean failure for the paint job, not sure about stucco although I've painted many sttucco retaining walls that had stucco failure presumably by moisture from the back side.
Usually stucco is painted to protect it from moisture infiltration but since this is a retaining wall, the moisture needs to be stopped at the back side! I'm a painter not a mason but I know an unsealed backside on a retaining wall will mean failure for the paint job, not sure about stucco although I've painted many sttucco retaining walls that had stucco failure presumably by moisture from the back side.