Certifications & Awards



Window & Door top 100 rankings are released annually and represent North America’s 100 largest manufacturers of residential windows, doors and/or skylights, based on sales volumes. NT Window made the top 100 list in 2009, 2010, 2011 & 2013.






As an ENERGY STAR Partner NT Window not only manufactures ENERGY STAR Qualified window and door products, but we are also committed to reducing our energy costs and finding new ways to lessen our impact on the environment.




The ENERGY STAR Most Efficient mark is an extension of the ENERGY STAR® brand and is designed to recognize and advance the most efficient products among those in the industry that qualify for the ENERGY STAR designation. The goal of this endeavor is to promote and encourage the development of new, more energy-efficient products into the market more quickly.

Please look for the ENERGY STAR Most Efficient logo for qualifying products. 


Many homes built before 1978 have lead based paint on the walls of the dwelling.  Lead based paint can be a health hazard so before renovating your home, it is important to have a professional certified in Lead Safe work practices for safe removal.




The American Architectural Manufacturers Association (AAMA) is made up of window, door, skylight, curtain wall and storefront manufacturers, suppliers and test labs. The AAMA Certification Label provides confidence that the products you choose, when installed properly, match the quality of the sample product tested.





The Efficient Windows Collaborative (EWC) is a consortium of manufacturers, home performance contractors, research organizations and others dedicated to increasing the market share of high-efficiency windows in both the residential and commercial sectors. The EWC promotes energy performance rating and labeling among window manufacturers and educates consumers about the benefits of energy-efficient windows and how to select efficient windows for various climates.






All of us here at  NT Window are committed to providing our customers with nothing but our best in every aspect of our business.  We take our reputation very seriously and are invested in our business and our customers success.  With this in mind NT Window operates with an A+ rating from the Better Business Bureau.





NFRC is a non-profit organization that administers the only uniform, independent rating and labeling system for the energy performance of windows, doors, skylights, and attachment products.





The WDDA is the foremost group representing the residential window and door replacement dealer. The primary mission of the WDDA is to represent retail, wholesale and installing dealers of new and replacement windows, doors, skylights and related building products.



IGMA is the international standards development organization for the insulating glass industry. Its focus is on developing new technologies in the manufacturing of insulating glass units supported by new research, best practices and the development of codes and standards. 


      Window & Door Alliance Logo