Roofing & More, Inc.
609 Carlisle Drive, Herndon VA 20170
Measuring Replacement Efficiency
Roofing & More
What’s The More For?
Windows, Siding, Gutters & Doors


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The most important measure of a window’s performance is its U-Factor. The U-Factor indicates the rate of heat flow through a window. The lower the U-Factor, the more energy efficient the window will be. U-Factor measures the entire window unit — glass, frame, sash, spacers — and is the only measurement accepted by the U.S. Department of Energy’s EnergyStar program. U-Factor ratings generally fall between 0.20 and 1.20. The lower the U-value, the greater a window’s resistance to heat flow and the better its insulating value.

Solar Heat Gain Coefficient

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Solar Heat Gain Coefficient (SHGC) measures how well a product blocks heat caused by sunlight. SHGC is expressed as a number between 0 and 1. The lower a window’s solar heat gain coefficient, the less solar heat it transmits in the house. What does this mean for you? No more hot sun coming through the window that requires you to run the AC a little colder.

Visible Transmittance

Visible Transmittance (VT) measures how much light comes through a window’s glass package. The visible transmittance is an optical property that indicates the amount of visible light transmitted. VT is expressed as a number between 0 and 1. The higher the VT, the more light is transmitted. Roofing & More offers windows with very low visible transmittance, so light doesn’t come through the windows and fade your floors, furniture and window dressings.

Air Leakage

The lower a window’s air leakage rating, the less air will pass through cracks in the window assembly. Our windows achieve some of the lowest AL ratings on the market.

Condensation Resistance

Have you ever noticed water droplets forming on interior window glass? Condensation Resistance (CR) measures the ability of a window to resist the formation of condensation on the interior surface of that window. The higher the CR rating, the better that product is at resisting condensation formation. CR is expressed as a number between 0 and 100. We make sure our customers understand the importance of choosing a window with a low CR rating.

If you are considering replacing the windows in your home in Arlington, Alexandria, Herndon, Chantilly, or Sterling your first step should be to call or contact Roofing & More for a free, no obligation estimate. We’ll go over your window options and help you make the right decision for the long-term safety and comfort of your family.

Let Us Make You Comfortable

If you are considering making repairs or improvements to your home in Herndon, Chantilly, Sterling or anywhere in Northern Virginia, please consider talking with Roofing & More before choosing a contractor. I think you’ll be surprised and pleased with how easy and affordable we make the home improvement process.

I invite you to call me at (703) 467-0206 or click here to schedule a FREE in-home consultation and estimate. Let my family help your family make your home more comfortable, convenient and valuable!

Kyle Hoffman

Customer Reviews
INTEGRITY...That Makes a Difference
I want to thank Roofing & More Inc for a job well done at my house here in Annandale. Roger Powell was the Site Manager, and has been with me since the original meeting with Dustin Holiday with the first...
Elizabeth Winkle
This is my second time using Roofing and More, Inc. Being inside my home is my favorite place to be and knowing that I can count on Kyle and his team to treat me and my home with the upmost...
Craig Deely
I had R&M replace my roof October a year ago. A few months later my neighbor had another local contractor replace hers. A couple of weeks ago she had a leak with ceiling damage requiring buckets in the attic for...
Mark Deffenbaugh
Excellent Service. Roofing & More, Inc. provided excellent service replacing our roof and excellent customer service as well! Marie Hoffman has been one of the best customer service representatives I’ve worked with throughout the years. She was extremely patient, respectful,...
Patricia Ware
This Company is awesome, very kind, they go beyond to help their customers,. Maria was very professional in helping me. Thanks Roofing & More, keep up the good work March 13, 2018 by Tracy, Herndon on Roofing & More, INC....
Roofing and More has bent over backwards to relieve the stress of the impact of the storm. Jennifer has been first rate in ensuring service was scheduled and even stayed late (after 7pm) to call and confirm everything was going...
Chris H
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