FGIA Updates Specification Giving Design Considerations for Multiple-Cavity Insulating Glass Units

The Fenestration and Glazing Industry Alliance released an updated specification offering guidelines intended to identify design considerations to be taken into account when designing multiple-cavity IGUs and the evaluation of the manufacturing process as well as addressing the quality requirements of the sealed space of a multiple-cavity IGU. IGMA TM-1300-26, Design Considerations for Multiple-Cavity Insulating Glass Units, an FGIA document, is now available for purchase in the FGIA online store. This document was last updated in 2013.

The purpose of this document is to guide the design, fabrication and use of multiple-cavity IGUs within the fenestration industry.

“Demand for increasing energy-efficient fenestration products continues to rise,” says Amy Becker, FGIA Glass Products Specialist, and staff liaison for the FGIA Design Considerations for Multiple Cavity IGUs Task Group. “One method for addressing this demand is by increasing the number of cavities in an insulating glass unit. This method, while effective, can create new challenges. These guidelines are therefore intended to assist those who design, specify, fabricate and install units.”