What is ASTM E1105 Testing?
The ASTM E1105 is the Standard Test Method for Field Determination of Water Penetration of installed exterior windows, skylights, doors, and curtain walls. It simulates wind-driven rain using calibrated traceable equipment while applying a specified negative air pressure to mimic actual weather conditions.
As a premier Water Intrusion Specialist, Xpress Testing provides accurate, repeatable, and defensible results that document project performance and building integrity.
We also specialize in Building Leak Detection using advanced technology, proprietary techniques, and unmatched experience in setting up and operating our spray equipment to locate and replicate water leakage.
ASTM E1105 Test Procedures
Procedure A — Uniform Static Pressure
- Uniform static air pressure differential at the project-specified level.
- Water applied at 5.0 US gal/hr/ft² to exterior face and adjacent construction.
- Interior monitored for leakage during and immediately after the test.
- Typical duration: ~15 minutes.
Procedure B — Cyclic Static Pressure
- Typically four cycles of 5 minutes pressurized with 1 minute off between cycles (unless otherwise specified).
- Continuous water application at 5.0 US gal/hr/ft² during the test sequence.
- Interior monitored during and immediately after each cycle.
- Total duration: ~23 minutes.
Spray Rack Testing for Building Leak Detection
Spray Rack Testing is the common term for using the ASTM E1105 water spray apparatus. It delivers a controlled and measurable water flow, enabling repeatable testing that aligns with ASTM standards—ideal for forensic water intrusion investigations and quality assurance. By contrast, hose testing is informal, non-uniform, and lacks quantifiable controls, so it’s not recommended for performance verification.
Performance, Forensics & Retesting
Each location is reported as Pass or Fail based on water penetration to interior surfaces. If leakage is observed, Xpress Testing provides forensic diagnostics to determine cause and coordinate corrective actions with manufacturers and installers. After remediation, retesting verifies the effectiveness of repairs.
Local Service Areas
Los Angeles Division — ASTM E1105 Testing
Los Angeles, DTLA, Beverly Hills, Bel Air, Santa Monica, West LA, West Hollywood, Pasadena, Malibu, Palos Verdes, Studio City, Holmby Hills, Century City, Brentwood, Hollywood Hills, Burbank, Glendale.
Orange County Division — ASTM E1105 Testing
Anaheim, Irvine, Newport Beach, Huntington Beach, Laguna Beach, Laguna Niguel, Newport Coast, Corona del Mar, Monarch Beach, Coto de Caza, Costa Mesa.
Inland Empire Division — ASTM E1105 Testing
Rancho Cucamonga, Claremont, Upland, Ontario, San Bernardino, Riverside, Redlands, Corona, Norco, Chino Hills.
San Francisco Bay Area Division — ASTM E1105 Testing
San Francisco, Oakland, San Jose, Atherton, Palo Alto, Menlo Park, Hillsborough, Los Gatos, Burlingame, Piedmont, Woodside, San Carlos, San Rafael.
San Diego Division — ASTM E1105 Testing
San Diego, La Jolla, Rancho Santa Fe, Del Mar Highlands, Coronado, Fairbanks Ranch, Encinitas, Carlsbad, Del Mar, Oceanside.
Arizona Division — ASTM E1105 Testing
Phoenix, Glendale, Mesa, Paradise Valley, Scottsdale, Fountain Hills, Carefree, Arcadia, Tucson.
Nevada Division — ASTM E1105 Testing
Las Vegas, Summerlin, MacDonald Highlands, Green Valley Ranch, The Ridges, Henderson.
Frequently Asked Questions
How long does ASTM E1105 testing take?
Procedure A typically runs ~15 minutes. Procedure B usually runs ~23 minutes (four 5-minute cycles with 1-minute intervals), plus setup and documentation time.
Which products can be tested?
Windows, doors, storefronts, window walls, curtain walls, skylights, and other exterior cladding systems per project specifications.
Is spray rack testing the same as hose testing?
No. Spray rack testing uses calibrated equipment and quantifiable flow rates that meet ASTM standards. Hose testing is informal and lacks precise controls.
What happens if a test location fails?
We document findings and perform forensic leak investigations. After manufacturer/installer remediation, we retest to confirm repairs.
Do you service projects outside California?
Yes. We service Arizona and Nevada with regional teams and can support projects across the U.S. upon request.