Tests for stucco permeability have been performed since 1981. These tests prove beyond any doubt that stucco generally is waterproof. Only when stucco is adulterated by an applicator who may or may not know better is there passage of water through it. But just pick any stucco job at random and odds are extremely high that it will prove to be resistant to water passage unless it is severely cracked.

• Weatherproof. Properly mixed and applied stucco DOES NOT permit passage of water through it.
  
  
• Can be configured to any design requirement
  
  
• Fireproof. Stucco provides a one-hour fire resistance rating.
  
  
• Durable. Lasts the life of the building
  
  
• Little or no maintenance. Stucco does not need to be painted. When a stucco surfaces gets dirty, it can be cleaned with a garden hose
  
  
• Any desired texture or finish - limited only by imagination
  
  
• Noise resistant. The mass of stucco controls noise better than other finishes.
  
  
• Economical. Low cost compared to other finishes means buildings can be constructed faster, cheaper.
  
  
• Attractive. Stucco finishes present pleasing aesthetics in any environment
  
  
• For homes, it can be applied to keep up with production. One week from start to finish.
  
  
• Easily repaired. Damage to stucco finishes can be remedied easily at negligible cost.
  
  
• Protection. A lath and plaster assembly resists penetration in a short time, and requires tedious work to get through.
  
  
• Does not need repainting. If a new color is desired, a stucco fog coat can be applied at lost cost.
  
  

COPYRIGHT 1996 by John J. Bucholtz, P.E.
John J. Bucholtz, P.E.,
Consultant and Publisher of Techniques and Comments
1745 Saratoga Av., Suite A, San Jose, CA 95129