It is important in terms of comfort to the internal spaces to ensure minimal wind/breeze intrusion and is also an important factor when it comes to environmental factors, to limit the travel of energy from the interior to the exterior side of the building. In the interior application where air conditioning zoning is applied and each zone is controlled by individual thermostats air passage should be sealed prortly to achieve correct temperature.
This standard is most often referenced as a laboratory test and is similar to the ASTM E 1105 (Standard Test Method for Field Determination of Water Penetration of Installed Exterior Windows, Skylights, Doors, and Curtain Wall by Uniform or Cyclic Static Air Pressure).
The ASTM E 1105 is specifically written for field-testing installed fenestrations. The ASTM E 331 is also similar to the ASTM E 547 with the exception of the way air pressure is applied. The ASTM E 331 is a uniform test of consistent air pressure, and the ASTM E 547 is a cyclic test during which air pressure is cycled on and off during testing.
The ASTM E 331 testing is performed by applying water to the exterior of the test specimen while lowering the pressure inside by means of an air chamber built on the inside or opposite side of the test specimen. The water spray system has nozzles spaced on a grid to deliver water so that the test specimen is wet uniformly, including those areas vulnerable to water penetration.
The calibrated spray apparatus (spray-rack system) delivers water to the test specimen at a rate of 5.0 U.S. gal/ft²-h. The testing pressure differential is usually determined by the testing specifier. Most generic specifications call for a minimum testing pressure of 6.24 psf.
BDG utilizes professional testing equipment that is calibrated to each specific testing standard for accurate results. Our field consultants are properly trained and knowledgeable of all testing standards. BDG has extensive knowledge of most building systems and specializes in forensic water intrusion investigations. This allows us to not only properly test fenestrations on new construction projects, but also pinpoint the cause of any test failures and provide accurate recommendations to achieve successful testing results. Failures during quality assurance (new construction) testing can result in unnecessary delays that impact your bottom line.
If you are looking for a reputable second or third-party testing company to perform accurate professional testing, provide concise reports, and help you through the entire process, contact BDG today. We provide testing services throughout the United States from our headquarters located in Atlanta, GA.
The process of water penetration testing consists of several key steps:
Preparation and Setup A calibrated spray apparatus or spray-rack system is established to ensure uniform water distribution across the test specimen. Nozzles are arranged in a grid pattern to facilitate even coverage, maintaining a consistent application rate of 5.0 U.S. gallons per square foot per hour. This approach guarantees that all sections, particularly those prone to leaks, receive adequate wetting.
Application of Pressure Differential In accordance with ASTM E 331, a pressure differential is generated by lowering the internal pressure using an air chamber positioned on the interior side of the specimen. Water is then sprayed on the external side to replicate conditions of rain and wind. Testing pressures are generally defined, with a minimum standard of 6.24 pounds per square foot (psf), although higher pressures may be employed depending on specific project needs.
Observation and Documentation of Results Throughout the testing process, any visible points of water penetration are meticulously monitored and recorded. These locations highlight potential weaknesses in the fenestration system, which may require modifications or redesigns to enhance water resistance.
Superior Sealing Solutions Employing top-grade gaskets, sealants, and weather-stripping products significantly improves water resistance by establishing a robust barrier against moisture and air infiltration.
Expert Installation Ensuring accurate alignment and secure fitting of fenestration systems by qualified professionals is essential. Any misalignment may result in gaps that undermine the system’s ability to resist water.
Regular Maintenance and Evaluation Conducting routine inspections and maintenance is vital for detecting any deterioration in seals or materials, allowing for timely replacements or repairs to sustain optimal water resistance over time.
WhatsApp us