Window and Door Testing

From energy efficiency to resisting hurricane-force impact, consumers demand more than ever from their windows and doors. To meet these safety, quality, and energy efficiency standards, manufacturers rely on independent laboratories like Stork. Stork operates three unique windows and doors testing laboratories in Wausau (Wisconsin), Des Moines (Iowa), and Maplewood/St. Paul (Minnesota) to serve the fenestration industry.

Stork supports the fenestration industry with a broad range of testing and consultation capabilities and methods. Some of the services we offer include:

Air/water infiltration Air infiltration and water penetration testing is critical for judging the suitability of a window for an area or building. Techniques can be combined with variable wind velocities for a customized testing program.

Structural window and door testing Structural tests are conducted to evaluate the integrity of a door, wall, or window by simulating high interior and exterior wind pressures.

National Fenestration Rating Council - NFRC Modeling and Simulation
Stork TCT offers the combined qualifications of an NFRC Certified Simulator, CMA Administrator, and ACE to offer energy-related rating and NFRC certification testing to both the residential and commercial fenestration industries.

Expert Witness Testing
Stork experts frequently consult on insurance, law enforcement, and litigation cases. Testing can be done in the lab, at the manufacturer's location, or onsite.

Miami-Dade County Testing
Stork’s fenestration experts include engineers qualified to conduct testing to Miami-Dade County Building Code Compliance Office standards.

AAMA/WDMA Testing
Stork experts can test to AAMA 103.3 as well as some Window and Door Manufacturers Association (WDMA) standards.

ASTM Cycle/Impact
Simulated hurricane testing includes use of impact cannons to fire lumber missiles at a window or door sample, and subsequent simulated wind load cycling to evaluate impact-resistant windows and doors. These tests meet the protocol of the Southern Building Code Council (Miami-Dade County) and Texas Department of Insurance (TDI).

Acoustic Testing (ASTM & ISO 140-3)
Architects and engineers specify different Sound Reduction (R_w), Sound Transmission Class (STC), and Outdoor/Indoor Transmission Class (OITC) ratings for projects, depending on the building environment, i.e., along freeways, near airports or hospitals, etc. Stork operates 2 specially-designed in-house reverberation chambers to provide STC and OITC testing and assign R_wSTC/OITC ratings. Field testing is available.

Safety Glazing Certification Council - SGCC Testing
Stork Twin City Testing laboratory in Des Moines is nationally accredited by the Safety Glazing Certification Council (SGCC) Testing and other glass agencies and organizations.

Automotive Glass Testing
Stork Twin City Testing in Des Moines is accredited by the Automotive Manufacturers Equipment Agency (AMECA), the Safety Glazing Certification Council (SGCC), and other agencies.

Related Testing
Hardware cycling, vinyl material evaluations, impact glass breakage, and forced entry resistance are a few of the other testing services offered by Stork.

Want to learn more about window and door testing or other services we offer? Send us your question for a quick response.

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