The 2011 edition of the "North American Fenestration Standard/Specification for windows, doors, and skylights," NAFS-11, replaces the 2008 version. It was created by representatives of the American Architectural Manufacturers Association (AAMA), Window & Door Manufacturers Association (WDMA), and the Canadian Standards Association (CSA). NAFS-11 already is referenced in 2012 editions of the International Building Code and is proposed to replace the National Building Code of Canada when that country's 2008 edition is updated.
Changes made in NAFS-11 include:
- new product criteria sections for parallel opening windows and secondary storm products,
- expanded information on tubular daylighting device products to include closed- and open-ceiling options,
- new ratings and designations on mullions,
- added requirements on lead content for hardware,
- and a general restructuring of the standards that created separate sections for products and materials and components.
The standard underwent five rounds of proposals and votes before winning final approval.
"The newest version of NAFS was created to allow consumers more product choices and clearer specifications," said Ray Garries, corporate manager of external affairs for Jeld-Wen and co-chair of the tri-party group that created NAFS-11. "This expanded document will service the fenestration needs of the building community for many years."
Pella Windows and Doors senior project engineer Joe Hayden, another co-chair of the standards group, called the new rule "evidence of the fenestration industry's desire to offer our customers a single, unified performance specification across borders."A Canadian Supplement to the standard has been created by the CSA A440 Technical Committee to address those few Canada-only items not included within the new NAFS standard, the three grouips said in a joint statement.