Sto® Reintroduces Proven Solutions for Protecting Stucco Exteriors

Technical Approvals Verify Performance, Durability and Quality 

Atlanta, GA – (July 10, 2020) Sto Corp., the innovative world leader in full system facades is excited to relaunch two solutions to protect stucco exteriors – Sto Crack Defense and Sto DrainScreen®Sto Crack Defense is a fortification layer that drastically minimizes surface cracking in stucco wall systems while Sto DrainScreen works under veneers to evacuate moisture away from wall sheathing materials. Sto understands how to enhance Stucco facades performance and extend the life of stucco facades better than anyone,” explained Sto Corp senior product manager Karine Galla, “Sto Crack Defense and Sto DrainScreen® are two great examples.” 

Newly relaunched Sto Crack Defense consists of a layer of Sto woven glass fiber reinforcing mesh embedded in Sto polymer basecoat and adds strength and flexibility to outer wall systems. “Cracking is the primary complaint people have with stucco,” said Galla, “Sto Crack Defense is a simple solution to this common issue. It really is a life saver.”  

Because Sto Crack Defense can be added to any of Sto’s fully engineered stucco systems, there is no need to compromise a creative vision for reasons of durability. “Designers like it because it doesn’t cramp their style, contractors like it because it’s easy to work with, explains Galla, “And owners like it because adding Sto Crack Defense to a wall system actually extends the warranty. 

Sto Crack Defense is not limited to application in new construction. In fact, in instances where Sto Crack Defense wasn’t applied and cracks do form years after application, the system can be used to refinish and repair cracks in existing walls. 

Sto DrainScreen, meanwhile, protects stucco by evacuating trapped moisture under stucco, stone, siding, brick, and thin brick veneers with above grade vertical wall assemblies“Some sheathing materials are particularly vulnerable to moisture,” said Galla, “No matter how tight the wall assembly is, moisture may find a way in, so it’s crucial to design a system that provides a path for moisture to escape. And that’s exactly what Sto DrainScreen does. The highly-permeable polyester nylon drainage mat allows trapped moisture to dry out faster.” Used in combination with StoGuard® air & moisture barriers, Sto DrainScreen provides the highest available levels of protection against moisture intrusion. 

Including Sto Crack Defense and Sto DrainScreen in their plans is something more designers would be wise to consider, suggests Galla. “Some designers and contractors perceive these products to come at a premium,” she explained, “But the opposite is actually true. In both cases, a small up-front cost saves money over the long run.” 

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About Sto

Sto is an international technology leader in the design and production of innovative building materials tailored to human needs. Our wall systems, coatings and finishes have been the choice of leading architects, engineers and contractors for 61 years, and we are the world’s largest manufacturer of exterior thermal insulation systems, with 35 subsidiaries, more than 5000 employees, and 21 factories operating around the globe.

Sto Corp., based in Atlanta, Georgia, produces a broad range of advanced cladding, air moisture barrier and coating systems that deliver energy efficiency and superior aesthetics for building construction, maintenance, and restoration. Sto Corp’s plants are ISO certified for environmental protection and quality control, and are strategically located to serve more than 200 distributor shipping locations throughout North and South America. Sto Corp. is committed to developing next-generation building solutions, and the company’s employees are advocates for technical mastery in pursuit of a sustainable built environment.

For more information, visit or call toll free (800) 221-2397. Follow Sto Corp. on Twitter @stocorp, LinkedIn at, Facebook at,  Architizer, and the Sto blog “ARCHITRENDS.”