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The International Window Cleaning Association (IWCA) and The Glass Association of North America (GANA) released a joint Glass Informational Bulletin (GIB) titled Construction Site Protection and Maintenance of Architectural Glass outlining the need for proper protection of architectural glass throughout the construction process to all general contractors and builders. Please click here to view the bulletin.

Article from USGlass Magazine, "Maximizing Ceramic Furnace Roll Performance," By Renald D. Bartoe, Frederick Caillaud, Dr. John Dodsworth and Jerry Osele. © 1999 US Glass. Posted with permission. This article is for viewing only. It may not be downloaded or printed.


Help educate builders about tempered glass quality problems before they become scratches. Window cleaners can now download documents from the IWCA site to be included in a Builder Education Packet. Send this packet of information to builders in your area along with your proposal or marketing materials.

Study the IWCA's "Talking Points" posted here, to help understand the IWCA's position before attempting to explain the tempered glass quality issue to builders and other customers.

Some tempered glass surfaces are highly susceptible to scratching due to contamination with microscopic surface defects called fabricating debris. Tempered glass scratches caused by fabricating debris have distinct characteristics, and should not be confused with other types of scratches. Click here to learn about field identification of fabricating debris scratches.

The IWCA recommends a tempered glass scratch liability waiver for all construction window cleaning contracts, before any work is done. Click here for an example of a Cleaner to Builder liability waiver.

The IWCA also suggests that builders require suppliers to provide quality tempered glass without fabricating debris, so that all glass can be cleaned - without scratching - using the same tools and methods. Click here for an example of a Builder to Supplier waiver.

The IWCA Tempered Glass Informational Bulletin 2004 - Scrapers & Fabricating Debris is the IWCA's official position.


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