Window Terminology: Window Terms Starting with "U"

U-Factor (U-value)

Measures heat loss or heat gain through a product.  The U-factor may be expressed for the glass alone or the entire window, which includes the effect of the frame and the spacer materials. The lower the U-factor, the greater a window's resistance to heat flow and the better its insulating value.

Ultraviolet Light (UV)

The invisible rays of the spectrum that are outside of the visible spectrum at its short-wavelength violet end. Ultraviolet rays are found in everyday sunlight and can cause fading of paint finishes, carpets, and fabrics.

UniShield

The exclusive line of vinyl replacement windows offered by Universal Windows Direct dealers across the country!

Universal Windows Direct

Nationwide group of dealers and window installers that offer the exclusive UniShield line of windows, siding and doors at factory direct prices.

 

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