Traditional Smooth Finish Stucco, or “Santa Barbara” style finishes will always experience some level of cosmetic cracking. Smooth finishes are less forgiving by nature. The precise troweling needed to create that look brings fine aggregate to the surface, ever so slightly reducing the mechanical bond of the larger aggregate — it comes with the territory.
Because there’s minimal texture to disguise movement, hairline cracking tends to show more readily—particularly in areas of stress concentration or movement. That’s why we always recommend CRS (“Crack Reduction System”) on our smooth finish projects.
Traditional Cracking Mitigation Measures
Base & Mesh (CRS): “Crack Reduction System”
One of the most effective steps—especially for smooth finishes—is a Crack Reduction System (CRS), commonly described as a base coat + fiberglass mesh system installed over the brown coat prior to the finish coat.
In simple terms: the acrylic-modified base coat and mesh help distribute stresses and reduce crack propagation before the finish coat is applied. For smooth finishes, CRS is often the most important “foundation” upgrade.
The system consists of fiberglass mesh & acrylic-modified (synthetic) base coat over the brown coat that can be done prior to the installation of the finish coat. This process will add to the overall cost, but will substantially reduce the propensity for cosmetic cracking and further enhance the beauty of smooth stucco.
Synthetic (Acrylic) Smooth Finish Systems
Acrylic finish coats are often chosen as an alternative to conventional cement-based color coats. Because acrylic finishes have elastomeric qualities, they can flex and bridge typical surface cracking more effectively than cement-based finishes. Acrylics also offer excellent moisture resistance and color stability—often making them a strong choice for contemporary projects, dark colors, or harsh coastal exposure.
That said, some designers and owners prefer the authentic depth and variegated character of a traditional cement-based Santa Barbara finish.