Interstate Building Materials, Inc dba Interstate Window & Door Company

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. Our goal is to provide fair, accurate, and reliable energy performance ratings so that:

• Architects, builders, code officials, contractors, homeowners, and others can compare different products and make informed product choices.
• Building officials, state government employees, and others involved in code development and enforcement can determine if products meet local codes
• Government- and utility-run energy efficiency programs can establish performance requirements and standards.
• Manufacturers have a fair and level playing field to compare products and an accurate method of showing the energy benefits of new designs or technology.

ENERGY STAR was created to help consumers easily identify products, homes, and building that save energy and money, and help protect the environment. As the government-backed, trusted symbol for energy efficiency, the ENERGY STAR label identifies highly efficient products and designates superior energy performance in homes and buildings. ENERGY STAR qualified windows today are, on average, twice as efficient as the average window made 10 years ago and can help reduce your energy bills significantly.

Products that are recognized as the Most Efficient of ENERGY STAR in 2019 meets rigorous energy efficiency performance levels set in the US. Our CompositWood® windows have been awarded the ENERGY STAR Most Efficient mark for 2019.

Third party inspection and certification programs what enable window, door, and skylight manufacturers to demonstrate compliance with the requirements of building codes, the ENERGY STAR® Windows Program and other utility/tax rebate incentive programs.

Proud contributor to Habitat for Humanity ReStore Program.

Our products and processes emphasize energy savings – and that means we consume less energy to minimize the CO2 released into our environment.
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Our buildings save energy by utilizing in-floor radiant heating during off-peak energy hours and by using motion controlled lighting.
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Our processes conserve resources – like filtering and reusing glass wash water for glass rinsing, and recycling our vinyl and glass scrap created during the fabrication process. And of course, we have a recycling program for metals, cardboard and paper.

Interstate windows have been designated as “Envirosealed” windows through the use of the Duralite Spacer System technology, which saves energy, saves money and helps to save the environment.