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Frequently Asked Questions


What is Solar Heat Gain Coefficient?

Solar Heat Gain Coefficient (SHGC) measures how well a product blocks heat from the sun. SHGC is expressed as a number between 0 and 1. The lower the SHGC, the better a product is at blocking unwanted heat gain. Blocking solar heat gain is particularly important during the summer cooling season.

More Fenestration Facts from NFRC

What is a U-Factor?

U-Factor measures how well a product prevents heat from escaping a home or building. U-Factor ratings generally fall between 0.20 and 1.20. The lower the U-Factor, the better a product is at keeping heat in. U-Factor is particularly important during the winter heating season.

More Fenestration Facts from NFRC

What information is needed to order parts for my product?

It is important to have as much detailed information as possible.  Proper measurements for sash/panel replacement, as well as, your product series number are necessary for us to place an order for you.  If needed, visual aides, such as emailing pictures of your product can also be of assistance.

What documents do I need to provide in order to show proof of purchase or that I am the original homeowner?

Any form of documentation that states the date you purchased the product/home is helpful.  The builder would have the records of sale which would have this information as well.  Tax assessment papers showing the year that the home was built, customer receipt, or invoice would also include this information.