Energy-efficient upgrades, historic glass matching, and precision installations backed by our Comprehensive Workmanship Warranty. 20+ years serving DC, Virginia, and Maryland.
Watch Our Process
From energy-efficient double-pane upgrades to bay window installations, see how we transform homes across the DMV.
Complete Window Solutions
Windows are one of the most important elements of your home. They control natural light, ventilation, energy efficiency, noise levels, and curb appeal. When windows begin to fail -- whether through seal deterioration, frame decay, or simple age -- the effects ripple through your entire living environment: higher energy bills, uncomfortable drafts, condensation problems, and a home that just does not feel right.
Expert Glass Repair provides comprehensive window replacement services for homes and businesses across Washington DC, Northern Virginia, and Maryland. With more than 20 years of experience and thousands of completed installations, we offer the full range of solutions -- from glass-only IGU replacements that save you money when frames are sound, to complete frame-and-sash replacements when a fresh start is the better value.
Every project begins with an honest assessment. We never recommend full replacement when glass-only will do, and we never cut corners when full replacement is what your home needs. Our licensed installers work with all major window types, glass configurations, and frame materials, including specialty historic profiles for the DMV's many protected neighborhoods.
20+
Years Experience
5,000+
Windows Installed
4.9
Star Rating
100%
Satisfaction
Window Styles
From classic double-hung replacements to custom bay window installations -- we have the expertise and inventory to handle any window project in the DMV.
The bottom sash slides up while the top remains fixed. A classic, affordable choice found in many DMV homes.
Both the top and bottom sashes slide vertically, allowing superior ventilation and easier cleaning.
Hinged on the side and crank-operated, casement windows seal tighter than sliding styles when closed.
One or both sashes glide horizontally on tracks. A space-saving option that works well in rooms where you do not want a window protruding outward.
Bay windows project outward with three panels (typically a picture window flanked by two operable windows).
Large, fixed (non-opening) windows designed to maximize natural light and frame exterior views.
Our experts assess your home, discuss your priorities, and recommend the best window style and glass configuration for your situation. The consultation is always free.
Warning Signs
Recognizing these common issues early can save you money on energy bills and prevent further damage to your home.
Feel cold air around closed windows in winter or warm air leaking in during summer? The seals or weatherstripping have failed, and your HVAC system is working overtime to compensate.
Fog or moisture trapped between double-pane glass means the hermetic seal has broken. The insulating gas has escaped and the window can no longer perform as designed.
Windows that stick, jam, or refuse to stay open indicate frame warping, balance failure, or hardware deterioration -- common in older DMV homes exposed to seasonal humidity.
Old single-pane or failed double-pane windows can account for 25-30% of heating and cooling costs. If your bills are climbing despite consistent usage, your windows may be the culprit.
If traffic, lawn equipment, or neighborhood sounds are loud inside your home, your windows lack adequate acoustic insulation. Modern dual and triple-pane glass dramatically cuts noise transmission.
Cracked glass, rotting wood frames, peeling paint, or warped vinyl are clear indicators that replacement is overdue. Even small cracks compromise insulation and structural integrity.
Noticing any of these signs?
Call (703) 679-7741 for a Free AssessmentGlass Technology
We offer a full range of glass technologies to optimize energy performance, safety, noise reduction, and UV protection for your replacement windows.
Two panes of glass separated by an insulating spacer and sealed gas cavity. The standard for modern energy-efficient windows, providing a significant.
Three panes with two insulating gas cavities for maximum thermal and acoustic performance.
A microscopic metallic coating that reflects infrared heat while allowing visible light to pass through.
Argon gas between panes is denser than air, slowing heat transfer and improving insulation.
Two layers of glass bonded with an interlayer that holds fragments together when broken. Provides security, UV protection, and sound dampening.
Heat-treated to be four times stronger than standard glass. When broken, it shatters into small, rounded pieces instead of dangerous shards.
Energy Savings
The DMV's hot, humid summers and cold winters make energy-efficient windows one of the smartest home investments you can make.
We install Energy Star certified windows that meet or exceed Department of Energy efficiency standards for the Mid-Atlantic climate zone. These windows feature advanced Low-E coatings, argon or krypton gas fills, and insulated frames that significantly reduce heating and cooling costs.
Under the Inflation Reduction Act, qualifying energy-efficient window replacements may be eligible for federal tax credits. This can significantly offset the cost of your window upgrade project. We install qualifying products and provide the documentation you need.
Up to 30%
Lower Energy Bills
with double-pane upgrades
Up to 50%
Less Heat Transfer
with triple-pane glass
70%+
UV Blocked
with Low-E coatings
50%+
Noise Reduction
with laminated glass
Why Replace Your Windows
Eliminate drafts, cold spots, and hot zones. New windows maintain consistent indoor temperatures, making every room in your home more comfortable regardless of the season.
New windows transform the look of your home from the outside. Clean lines, matching styles, and fresh frames make an immediate visual impact that enhances your property.
Window replacement is consistently ranked among the top home improvement projects for return on investment. Buyers look for energy-efficient, well-maintained windows.
Modern insulated glass reduces energy costs by 25-50% compared to old single-pane or failed double-pane windows. The savings compound year after year.
Our Process
A straightforward, professional process from initial consultation through final inspection. No surprises, no shortcuts.
We visit your home, inspect every window, identify issues, measure precisely, and discuss your goals -- energy savings, noise reduction, curb appeal, or.
Based on your window condition, home style, and budget, we recommend the right approach -- glass-only replacement, full-frame replacement, or a combination.
Every window opening is measured to exacting tolerances. We order custom-fabricated glass units and window components sized specifically for your home.
Our licensed installers remove old glass or frames, prepare the opening, install new windows with proper shimming and insulation, and ensure airtight seals.
We clean every window, remove all debris, and walk through the completed work with you.
Your installation is backed by our Comprehensive Workmanship Warranty. We provide care instructions, warranty documentation, and follow up to ensure your.
Why Expert Glass Repair
We can replace just the insulated glass unit -- not the entire frame -- saving you up to 60% compared to full window replacement companies. We assess honestly and recommend glass-only whenever frames are sound.
Many standard window replacements completed the same day you call. We carry a large inventory of common sizes and glass types on our trucks, reducing wait times dramatically.
Specialists in matching original glass profiles for Georgetown, Capitol Hill, Old Town Alexandria, and other historic neighborhoods. We preserve character while upgrading performance.
We install Energy Star certified glass that meets or exceeds DOE efficiency standards for the Mid-Atlantic climate zone -- qualifying you for potential federal tax credits.
Every window we install is backed by our Comprehensive Workmanship Warranty. We stand behind the quality of our installation for as long as you own your home.
Fully fully insured, bonded, and insured. We pull all required permits and comply with local building codes across DC, Virginia, and Maryland.
Customer Reviews
“Replaced 22 windows in our colonial. The team was meticulous -- matched the existing trim profiles perfectly and finished in two days. Our energy bills dropped significantly the very first month.”
“Finding someone who could match our 1890s wavy glass was impossible -- until Expert Glass Repair. They sourced historically accurate glass and the result is stunning. Our home looks authentic and performs like new.”
“The foggy double-pane windows in our sunroom were an eyesore. They replaced just the glass units -- not the frames -- saving us thousands. Crystal clear and energy efficient again.”
Common Questions
Most single window replacements take 30 to 60 minutes per window. A full-home project of 10-15 windows can typically be completed in one to two days. We schedule efficiently so your home is never left exposed overnight.
Yes. If your window frames are in good condition, we can replace just the insulated glass unit (IGU) -- saving you up to 60% compared to full-frame replacement. We assess every window honestly and recommend glass-only replacement whenever it makes sense.
Double-pane windows have two layers of glass with an insulating gas fill between them, providing good thermal and noise insulation. Triple-pane windows add a third layer and second gas cavity, offering up to 50% better insulation. Triple-pane is ideal for homes near highways, airports, or in areas with extreme temperature swings.
Yes. Energy Star certified windows may qualify for federal energy efficiency tax credits under the Inflation Reduction Act. We install qualifying products and can provide the documentation you need to claim the credit.
We handle all necessary permits for window replacement projects in DC, Virginia, and Maryland. We are also experienced working with HOA requirements and historic district regulations in areas like Georgetown, Old Town Alexandria, and Capitol Hill.
Every window replacement is backed by our Comprehensive Workmanship Warranty covering installation quality. The glass and hardware components carry manufacturer warranties that vary by product. We stand behind our work for the life of the installation.
Common signs include drafts around closed windows, fog or condensation between panes, difficulty opening or closing, visible cracks or decay, excessive outside noise, and rising energy bills. If you notice any of these, schedule a free assessment and we will give you an honest recommendation.
Yes -- historic window matching is one of our specialties. We source glass profiles that match original single-pane, wavy, and seeded glass found in Georgetown, Old Town Alexandria, Capitol Hill, and other historic neighborhoods. We work within historic preservation guidelines while upgrading energy performance.
Have a question not listed here?
Call (703) 679-7741Service Areas
Professional window replacement for homes and businesses throughout Washington DC, Northern Virginia, and Maryland.
Window replacement throughout NoVA -- from glass-only IGU swaps in Arlington condos to full-frame upgrades in Fairfax colonials. Northern Virginia's seasonal extremes demand energy-efficient windows, and we deliver Energy Star certified installations across the region.
Specializing in DC's unique mix of historic rowhouses and modern condos. We match original glass profiles in Georgetown and Capitol Hill while providing cutting-edge energy-efficient upgrades for newer construction across all four quadrants.
Serving Montgomery and Prince George's counties with expert window replacement. Many Maryland homes built in the 1990s and 2000s now have failing window seals. We restore clarity and energy efficiency with modern glass technology.
Recognize the telltale signs that your windows need replacement -- drafts, condensation, rising energy bills, and more.
Prepare your windows for harsh DC-area winters with insulation tips, weatherstripping, and glass upgrades.
A practical guide to deciding whether your windows need a simple repair or a full replacement -- costs and factors.
Related Services
Double and triple-pane insulated glass unit repair and replacement for foggy windows.
Learn moreEnergy-efficient glass upgrades that reduce utility costs and improve home comfort.
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Learn moreFix cloudy, moisture-filled windows with IGU-only replacement -- frames stay intact.
Learn more24/7 emergency glass repair and board-up services across the DMV.
Learn moreComplete residential glass services for every room in your home.
Learn moreStorefront, office, and commercial window replacement and repair.
Learn moreCustom glass cutting and IGU fabrication to exact specifications.
Learn moreGet a free, no-obligation estimate for your window replacement project. We'll assess your needs and provide an honest recommendation -- no pressure, no upselling.
Free In-Home Estimate
No obligation assessment
Comprehensive Warranty
On all installations
Energy Star Options
Tax credit eligible
Same-Day Available
For standard sizes