More than 35 companies worldwide now manufacture commercial, institutional and residential “multi-chamber” IG units based on a performance array of crystal-clear, low-emissivity films suspended midway between two panes of glass. In its leadership role among all worldwide Suspended Film (SF) fabricators, Alpen HPP insulating glass units, are certified by the Insulating Glass Certification Council (IGCC).
Certification and Testing
- IGCC testing involves high humidity, accelerated weathering, alternate high temperature/low temperature exposure, UV bombardment, and volatile fogging of the insulating glass units. The SF sealing technology used in Alpenglass insulating glass units, are tested in IGCC Certified laboratories. Thorough back-to-back A-Level tests were performed and all 16 units submitted passed.
Adhesion and Sealant Reliability
Film Adhesion Verification
- Testing extending back to 1979, has systematically stressed the spacer/film/spacer bond in excess of twice the actual tension level resulting from heat shrinking for each new Alpenglass configuration. Again with reference to 29 years of exclusive SF projects throughout the United States and Europe, evidence is strong that the film used in Alpenglass insulating units are both securely anchored and tensioned.
Sealant Edge “Bite”
- The cross-section construction of SF in Alpen HPP units provides two computer-bent steel spacers. The coated film extends completely through the spacer assembly to be securely “locked” in place by the secondary sealant. The inspected variance of this nominal ½” spacer/sealant sightline may not exceed 1/16”. The Alpen HPP perimeter face-width of dual-seal silicone units may be increased in response to high windload or blast requirements.
Aesthetics and Extreme Environments
- Perhaps the best reference for Alpen HPP optical clarity is the product’s repeated use, during the past two decades, by numerous art galleries. Gordon Anson, Exhibit Designer at the National Gallery of Art, specifically studied Alpen HPP, approving not only its clarity but assigning a Color Rendering Index of 92. Alpen HPP is now installed throughout the National Gallery, as well as the National Portrait Gallery, Freer Gallery, Art Institute of Chicago skylights and Pennsylvania State Museum.
Thermal Stress & Wet Environments
- Suspended Film has been preferentially specified in the harshest of municipal, institutional and residential swimming-pool environments for more than two decades. One very demanding project was the University of Colorado’s Recreation Center that maintained at 85˚F and approximate rh of 70%. By replacing their 22’ high curtainwall with Alpen HPP, the University of Colorado has benefited from virtually condensation free, near constant glass temperatures resulting in a reduction of heating loads for 30 years.
Suspended Film over the Years
Alpen HPP has provided dual-seal silicone units to countless projects nationwide during the past decade and beyond. A few Alpen HPP SF projects and dates installed include:
- Smithsonian National Portrait Gallery, Washington D.C., 1991
- New York Historical Society, NYC, 1982
- Smithsonian Freer Art Gallery, Washington D.C., 1992
- Holy Cross Energy, Glenwood, CO, 1981
- San Jose Convention Center, San Jose, CA, 1994
- Colorado State Services Building, Grand Junction, CO, 1982
- 700 Broadway (1891 Schermerhorn Building), NYC, 1992
- Virginia Air and Space Museum, Hampton, VA, 1984
Architectural Glass Project Gallery
To review just a sample of our project success stories, use our Project Gallery here