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Long Roofing is an essential business and will continue to serve our customers’ needs during these difficult times. Since some home improvement projects just can’t wait, we are monitoring the COVID-19 situation closely to ensure all critical safety measures as recommended by the US Centers for Disease Control and Prevention (CDC) are properly implemented to protect both our employees and our customers.
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Replacement Windows Installers in Gaithersburg, MD

Replacement windows for smart homeowners in Gaithersburg, MD

Long Siding

Do you need new windows for your home in Gaithersburg, Maryland? If so, choose Long Windows®.

Long Windows® is your exclusive provider of Quantum2 Heat Mirror® windows for the Washington, D.C. region. The Quantum2 Heat Mirror window was scientifically developed with lightweight, suspended film technology to block 99.7 percent of UV light, reduce outside noise and insulates with the same strength as a wall!

Quantum2 Heat Mirror windows are quieter than double-pane glass, reduce window condensation and maximize natural light. That’s a level of performance above and beyond the typical triple-pane window.

Think those replacement windows would work well in your Gaithersburg, MD home? We do, too.

Window replacement benefits

In addition to all of this, you’ll have a wide variety of aesthetic options to choose from when you select Long Windows for your home. Our windows are available in a number of different interior and exterior colors and wood grain finishes.

You can also choose from a range of style options, such as double hung, casement, awning, picture, bay, bow, and many more.

Contact us today for more information. We’ll be happy to schedule your free, in-home consultation.

Get educated: Learning more about new window replacement and window installation.

Ready for new windows? Here’s what Long Windows has to offer.

  • Window Options and Showcase
    Long Windows offers double hung windows, casement windows, awning windows, hopper windows, slider windows, bow and bay windows, picture windows, garden windows and specialty windows in a variety of interior and exterior color options and grille designs. See what Long Windows can do for your home.

  • Window Benefits and Specifications
    Protection from harmful UV rays, noise pollution and potential intruders — Long Windows can make your home safer and more comfortable. Learn more about energy-efficient windows from a family business with over 70 years of home improvement experience.

  • Window Testimonials
    Homeowners throughout the Washington, D.C., Maryland, Northern Virginia and West Virginia regions enjoy the unique benefits provided by Long Windows. We are proud to now serve Boston, Mass. and the New England area, as well. See some of our recent window work and learn how people just like you enjoy the view provided by Long Windows.

Let's talk about windows.

If it's time to replace your windows, we should talk today. We look forward to protecting your family and your home.

*On initial visit only. Minimum purchase required. For windows, three or more windows required. Cannot be combined with other offers. Prior sales excluded. Some exclusions may apply. Offer expires 3/29/2020.