ASTM Building Envelope Standards
Standards for drainage, weather-resistant barriers, and building envelope systems
Last updated: September 21, 2025
Contents
Overview
ASTM Building Envelope standards provide comprehensive testing and performance requirements for materials and systems that protect buildings from water intrusion, air infiltration, and environmental damage.
These standards cover weather-resistant barriers (WRB), drainage systems, flashing materials, and integrated building envelope assemblies that work together to maintain building integrity and energy efficiency.
Key Standards Areas
- Weather-resistant barriers and building wraps
- Drainage mat systems and rainscreen assemblies
- Window and door flashing systems
- Water-resistive coating systems
- Air barrier materials and assemblies
Key Testing Standards
Water Penetration Testing
ASTM E331, E547, and E1105 for water resistance evaluation
Air Barrier Performance
ASTM E2178 and E2357 for air leakage and assembly testing
Drainage Efficiency
ASTM E2273 and E2925 for drainage mat and rainscreen systems
Resources
California Balcony Compliance (SB 721 / SB 326)
ASTM building envelope standards are directly relevant to California's balcony inspection laws (SB 721 for apartments, SB 326 for condominiums). These laws require periodic inspection of exterior elevated elements including waterproofing systems.
Relevant Testing Standards
- ASTM E331: Water penetration testing for exterior walls and assemblies
- ASTM E547: Cyclic pressure water penetration testing
- ASTM E1105: Field determination of water penetration
- ASTM D4263: Moisture testing in concrete (balcony substrates)
When balcony repairs are required under SB 721/326, proper waterproofing systems must be installed to prevent future water intrusion and structural damage.
View Complete California Balcony Law Guide →Was this resource helpful?
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