Which New York City walls can be soft washed?
Most exterior walls can be cleaned, but each material needs its own approach.
Vinyl and aluminum siding
Common on houses in Queens, Staten Island and the Bronx. Soft washing removes green mildew and gray film. We keep the spray angled down so water does not get behind the panels.
Stucco and painted masonry
Stucco is porous and can crack or chip under pressure. Low pressure and a mildew-killing cleaner work best.
Brick and brownstone
Brick can be cleaned gently if the mortar is sound. Brownstone is a soft sandstone, and heavy pressure can erode its surface for good. We keep the method gentle and test a small hidden patch before cleaning the whole front.
