Exterior wall systems are designed to be aesthetically pleasing to the eye as well as use new and innovative materials that are cost and energy efficient, air and water resistant and fire safe.  Some examples of these materials are air barriers, water resistive barriers, exterior laminates, composite panels and foamed plastic insulation.

UL’s certification for exterior wall systems and components provides manufacturers as well as architects and building contractors the evidence needed to demonstrate compliance to the following code requirements:

  • Fire propagation resistance to NFPA 285, Standard Fire Test Method for Evaluation of Fire Propagation Characteristics of Exterior Non-Load Bearing Wall Assemblies Containing Combustible Components
  • Water penetration resistance to ASTM E331, Standard Test Method for Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls by Uniform Static Air Pressure Difference”
  • Air leakage resistance to ASTM E2357, Standard Test Method for Determining Air Leakage of Air Barrier Assemblies