CHICAGO – The Window and Door Manufacturers Assn., the American Architectural Assn. and the Canadian Standards Assn. have jointly released AAMA/WDMA/CSA 101/I.S. 2/A440-08; North American Fenestration Standard/Specification for Windows, Doors and Skylights. The standard, which is expected to be adopted for inclusion in the 2009 I-codes, includes a number of improvements over the previous (2005) version, including a key focus on clarifying the terminology relating to four performance criteria:  Design Pressure; DP; Performance Grade; and PG.

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