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1. What is R-Value?

R-Value stands for resistance. The higher the R-Value, the greater the amount of insulation the window provides. Because most of your home's heat loss is through windows and doors, it is important that you take into account the R-Value when purchasing windows and doors.

2. What is U-Value?

U-Value is the opposite of R-Value. The measure of the rate of heat loss through a material in the aspects of home design. One should strive for the lowest U-Value. The lower the U-Value, the less the heat is needlessly escaping.

3. What is Low E Glass?

Low emissivity coating blocks heat loss through normal window glass. It substantially increases thermal window performance while maintaining the appearance of uncoated glass. Low E coating lets in warm winter sun while blocking heat loss. It reduces summer heat gain, and also known to reduce the harmful ultraviolet rays, which cause fading of interior finishes.
**Required to meet energy star ratings (which is a U-Value of .35 or lower).**

4. What is Argon Gas?

Argon, a colorless, inert gas, can be used to replace air in an insulating glass unit. It decreases heat transfer significantly. Argon gas is clean, non-toxic, and non-flammable.

5. Is there an organization that sets performance and quality standards for vinyl windows?

Yes. The National Fenestration Rating Council (NFRC). This organization establishes guidelines for thermal performance.
**Labels bearing NFRC ratings are required in several states.**

6. When remodeling, can I get vinyl replacement windows to fit present openings?

Absolutely. Vinyl window manufacturers fabricate windows to within 1/8" increments of your current openings.

7. How do vinyl windows compare with windows made of other materials from an operating standpoint?

Vinyl's self-lubricating properties enhance its ability to slide. In addition, vinyl does not warp, twist, swell, or otherwise distort its shape.

Things you need to know when purchasing replacement windows

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