Stop paying to heat and cool the outdoors. Low-E glass, argon-filled insulated units, and triple-pane options that slash your energy bills and keep your home comfortable year-round.
The average DMV home loses 25-30% of its heating and cooling energy through windows. Our energy efficient glass replacements pay for themselves through lower utility bills, available tax credits, and utility rebates. Professional installation across DC, Virginia, and Maryland.
30%
Energy Savings
0.25
U-Factor
20+
Years Exp
4.9
Star Rating
The Problem
Old, single-pane, or failed double-pane windows are the largest source of energy waste in most DMV homes. Every dollar you spend on heating and cooling, up to 30 cents leaks right through your glass.
DMV summers regularly hit 95+ degrees with intense humidity. Old windows let solar radiation pour in, forcing your AC to run constantly.
Single-pane windows have a U-factor around 1.0, meaning they lose heat five times faster than a modern Low-E window at 0.25.
Failed seals and worn weatherstripping on old windows let conditioned air escape and outdoor air infiltrate.
Double-pane windows with failed seals (foggy glass) have lost their argon gas fill and insulating ability. They perform barely better than single-pane glass.
Old glass lets ultraviolet radiation damage your furniture, hardwood floors, artwork, and fabrics. Low-E glass blocks 95%+ of UV radiation, protecting your interiors while still providing abundant natural light.
Dominion Energy and Pepco rates have increased significantly in recent years. Every inefficient window becomes more expensive to live with as energy prices climb. The ROI on energy efficient windows improves every year.
We assess every window in your home, measure current energy performance, and show you exactly which replacements deliver the biggest savings. Tax credits and utility rebates may cover a significant portion of your investment.
Our Solutions
The workhorse of energy efficient windows. Two panes of glass with a Low-E coating and argon gas fill deliver excellent thermal performance for the DMV.
Three panes of glass with two Low-E coatings and dual argon gas chambers for maximum insulation and noise reduction.
When your frames are sound but your glass has failed, we replace just the insulated glass unit with a modern energy efficient unit.
Energy upgrades for historic homes that must maintain original window appearance.
Save Even More
Energy efficient windows qualify for significant financial incentives that reduce your out-of-pocket investment.
The Inflation Reduction Act provides a tax credit of up to 30% of the cost of qualifying Energy Star certified windows, including installation. We provide the documentation you need to claim the credit on your federal tax return.
Dominion Energy, Pepco, BGE, and other DMV utilities offer periodic rebates for energy efficient window upgrades. Rebate amounts and availability vary by utility and program year. We track current programs and help you apply.
Energy efficient windows increase your home's resale value. Real estate studies show that window replacement recovers 70-80% of its cost at resale while reducing your living costs every month until you sell. It is an investment that pays you twice.
How It Works
We inspect every window in your home, measuring current U-factors, checking seal integrity, assessing frame condition,
We specify the exact Low-E coating, gas fill, spacer type, and glass thickness for your climate zone, window orientation, and performance goals.
Our technicians install each window with proper air sealing, insulation around the frame cavity, and weatherstripping.
After installation, we verify seal integrity, check for air leaks, and confirm that each window meets its rated performance.
Old windows waste energy every single day. The sooner you upgrade, the sooner you start saving. And with federal tax credits available now, there has never been a better time to invest in energy efficient glass.
Client Reviews
“We replaced 22 windows in our colonial with Low-E argon-filled units. Our first winter heating bill dropped by 28%. Expert Glass assessed every window, specified different coatings for different exposures, and installed everything in three days. The tax credit covered a significant portion of the cost.”
Jennifer W.
McLean, VA
“Several of our double-pane windows had fogged up. Expert Glass replaced just the glass units instead of the entire windows, saving us thousands. The new Low-E glass made an immediate difference in comfort and our summer cooling bills dropped noticeably. Great recommendation from our neighbor.”
Steven H.
Silver Spring, MD
“Our 1920s row house had original single-pane windows. We needed energy efficiency without changing the historic appearance. Expert Glass installed interior Low-E storm windows that look period-appropriate and cut our energy bills by about 25%. They understood the historic preservation requirements perfectly.”
Angela T.
Capitol Hill, DC
Service Areas
We install energy efficient windows for homes and businesses throughout the Washington DC metropolitan area. Every installation is specified for our Zone 4A climate.
Arlington, McLean, Great Falls, Fairfax, Reston, Herndon, Leesburg, Ashburn, Vienna, Oakton, Falls Church, Tysons, Alexandria, Centreville, Chantilly, Springfield, Lorton, Woodbridge, Manassas, Sterling
Northern Virginia homes range from 1950s colonials with original single-pane windows to modern construction with aging double-pane units. We specify the right Low-E coating and gas fill for every window orientation and home style.
Bethesda, Chevy Chase, Potomac, Rockville, Silver Spring, Columbia, Bowie, College Park, Gaithersburg, Olney, Laurel, Germantown, Kensington, Takoma Park, North Bethesda, Wheaton, Hyattsville, Greenbelt
Maryland energy efficient window installations for Montgomery County, Prince George's County, and Howard County. BGE and Pepco service areas with potential utility rebate eligibility for qualifying installations.
Georgetown, Foxhall, Spring Valley, Cleveland Park, Woodley Park, Kalorama, Capitol Hill, Palisades, Forest Hills, Dupont Circle, Logan Circle, Adams Morgan, Brookland, Petworth, Takoma, all DC quadrants
DC window upgrades for row houses, townhomes, and historic properties. We navigate SHPO requirements for historic districts and provide energy efficient solutions that maintain architectural character while dramatically improving performance.
Common Questions
Ready to Start?
Schedule your free energy assessment. We inspect every window, identify the biggest energy losses, specify the right glass for each opening, and provide a detailed proposal including available tax credits and rebates.
Complete window replacement services for homes and businesses across the DMV. All glass types and frame materials.
Learn MoreFoggy window repair and insulated glass unit replacement for failed sealed units. Restore clarity and energy performance.
Learn MoreEnergy Star certified skylight installation. Bring natural light into your home with energy efficient skylights.
Learn MoreEnergy upgrades for historic homes that maintain original appearance while dramatically improving performance.
Learn More