20 Best Window Companies in Thurmont, MD (2023 Reviews)
Thinking about upgrading your home's windows? We've got all the information you need in this list of the top window installation companies.
We analyzed all the top-rated window companies in Thurmont and selected the best 20 based on:
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Customer reviews
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Window installation expertise
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Popularity with home-owners like you
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Updated September 15, 2023
Why you can trust EcoWatch
Although clean energy sources like wind and solar are important when it comes to reducing your carbon footprint, improving your home's energy efficiency can also have a big impact on home energy conservation. Traditional or damaged windows can cost you in electricity bills. In fact, the Department of Energy estimates that about 30% of your house's heat or cool air could be lost through your windows.
That's also bad news for the environment because the extra energy required by leaky windows increases your carbon footprint.
We've compiled a guide on the best installation companies to help you in your research, so you can not only take advantage of brand new windows, but also save money on your power bills.
Best Availability
Renewal by Andersen
- Great industry reputation
- Member of US Green Building Council
- Manufactures products in-house
Window Veteran
Window World
- EnergyStar Partner
- Wide variety of products and services
- Lifetime Warranty
Best Window Installation & Replacement Companies in Thurmont
The EcoWatch team evaluated dozens of window installation companies across Thurmont to narrow our list down to the best ones. The providers in this article scored best in our review categories, such as energy-efficient offerings, customer service, price, availability, local expertise and more.

Window World
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EnergyStar Partner
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Large serice area
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Low prices relative to competitors
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Great industry reputation
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Lifetime warranty
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Quality of service will depend on your area
Window World provides windows expertise in Thurmont. This company has been operating since 1995 and currently provides services to 200 locations nationwide.
It is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital.
Energy Efficiency of Window World WindowsThere are a wide variety of window types that Window World offers, some of which are Energy Star products. Its high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home.
How much does Window World cost in Thurmont?Prices aren’t mentioned on Window World’s website, but it's known for offering some of the most affordable window installations around. If you’d like more accurate information, you can request a quote on the company’s website.

Renewal by Andersen
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Great industry reputation
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Award-winning company
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Member of US Green Building Council
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Manufactures products in-house
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No lifetime warranty
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More expensive than competition
Renewal by Andersen is a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. This provider has 27 years of experience in the windows industry, and it has become one of the most respected companies in Thurmont. Many positive reviews on customer review websites back the provider's reputation.
Andersen may be the company for you if you're interested in one that uses in-home estimates and advanced digital tools to help you plan and visualize your project before getting started.
Energy Efficiency of Renewal by Andersen WindowsRenewal by Andersen has some Energy Star windows, but note that not all its windows are energy-efficient, so be sure to ask for Energy Star windows when inquiring. A handful of windows manufactured by the Andersen corporation were awarded Energy Star’s “Most Efficient” in 2021, and Andersen was named Energy Star’s Partner of the Year in 2019.
How much does Renewal by Andersen cost in Thurmont?Prices are not available on Andersen’s website since the cost of window installment varies greatly based on how many and what type(s) of windows you need. However, based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. For more accurate information on pricing, you can request a quote from the company.

Aeroseal Windows
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Many years of experience
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Great industry reputation
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Low number of customer complaints
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Manufactures products in-house
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Custom Designs
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No lifetime warranty
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Not ideal for residential installations
Aeroseal Windows is an installer that mainly serves commercial and multifamily properties, and also specializes in railings. If you’re looking for residential window installations, you should probably refer to one of the other companies on this list. Aeroseal has been in the window industry for around 23 years. Hundreds of positive reviews on customer review websites back the provider's reputation.
You may want to consider opting for Aeroseal if you're looking for a company that installs windows and doors at businesses across the Eastern U.S.
Energy Efficiency of Aeroseal Windows WindowsAeroseal Windows is an Energy Star partner with a variety of energy-efficient windows that are Energy Star certified. Note that not all of the company’s windows are Energy Star certified, so be sure to mention that you want energy-efficient windows to your Aeroseal representative when inquiring about services.
How much does Aeroseal Windows cost in Thurmont?Prices aren’t mentioned on Aeroseal’s website, but it provides high-quality windows at a competitive price point. If you’d like more accurate pricing information, you can inquire about a quote on the company’s website.

Window Nation
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Award-winning company
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Manufactures products in-house
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Custom designs
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Wide variety of products and services
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Installation not covered by warranty
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Limited service area
Window Nation is a company that serves hundreds of thousands of homeowners, mostly in the mid-Atlantic region of the U.S. This provider has 16 years of experience in the windows industry, and it has become one of the most respected companies in Thurmont. Many positive reviews on customer review websites back the provider's reputation.
Window Nation may be the company for you if you're interested in one that gives customers the opportunity to view products and to speak to a representative in person in its showrooms.
Energy Efficiency of Window Nation WindowsWindow Nation has some Energy Star windows, but note that not all its windows are energy-efficient, so be sure to ask for Energy Star windows when inquiring. Each product has windowpanes coated with a Low-E (low emissivity) glaze that prevents damaging UV rays from heating your home. Plus, the spaces between double- and triple-pane windows are filled with argon gas that’s been proven to improve home insulation.
How much does Window Nation cost in Thurmont?Prices are not available on Window Nation’s website since the cost of window installment varies greatly based on how many and what type(s) of windows you need. However, based on customer feedback, you can expect to pay between $300 and $525 per window installed, making it a more affordable option compared to competitors. For more accurate information on pricing, you can request a quote from the company.
We strive to stay unbiased and transparent by describing pros and cons for every company. Additionally, any partnerships do not influence our reviews.
More Window Companies in Thurmont
Renewal by Andersen of Capital Region - Sterling
Sterling, VA-
Price Transparency
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Educational Website
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Good Customer Service
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Free assessment
Services Offered
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Glass Showers
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Commercial Windows
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Stained Glass
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Sliding Glass
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Double-Hung
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Window Replacement
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Residential Windows
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Custom Window Designs
Window World of Frederick County
Frederick, MD-
Good Customer Service
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Free assessment
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Educational Website
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Price Transparency
Services Offered
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Window Replacement
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Sliding Glass
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Commercial Windows
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Energy-Efficient Options
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Double-Hung
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Custom Window Designs
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Residential Windows
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Bay Windows
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Fast Delivery
Champion Replacement Windows of Baltimore
Rosedale, MD-
Good Customer Service
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Free assessment
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Price Transparency
Services Offered
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Residential Windows
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Window Replacement
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Custom Window Designs
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Double-Hung
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Bay Windows
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Sliding Glass
Window Nation
Camp Hill, PA-
Free assessment
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Price Transparency
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Educational Website
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Good Customer Service
Services Offered
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Double-Hung
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Stained Glass
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Residential Windows
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Bay Windows
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Glass Showers
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Energy-Efficient Options
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Window Replacement
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Sliding Glass
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Custom Window Designs
Affordable Glass Inc
Thurmont, MD-
Good Customer Service
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Price Transparency
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Free assessment
Services Offered
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Custom Window Designs
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Window Repair
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Residential Windows
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Window Replacement
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Commercial Windows
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Glass Showers
Replacement Windows and Doors-Homerite Waynesboro
Waynesboro, PA-
Good Customer Service
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Free assessment
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Price Transparency
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Timely Service
Services Offered
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Fast Delivery
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Sliding Glass
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Residential Windows
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Window Replacement
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Energy-Efficient Options
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Custom Window Designs
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Commercial Windows
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Stained Glass
R&H Glazing Inc
Frederick, MD-
Price Transparency
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Good Customer Service
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Educational Website
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Free assessment
Services Offered
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Double-Hung
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Sliding Glass
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Window Repair
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Bay Windows
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Custom Window Designs
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Window Replacement
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Aluminum Window Frames
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Commercial Windows
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Residential Windows
Glass & Mirror Services, Inc.
Frederick, MD-
Price Transparency
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Good Customer Service
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Free assessment
Services Offered
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Double-Hung
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Custom Window Designs
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Aluminum Window Frames
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Stained Glass
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Glass Showers
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Commercial Windows
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Residential Windows
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Window Replacement
C3 American Exteriors
Mt Airy, MD-
Good Customer Service
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Free assessment
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Price Transparency
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Educational Website
Services Offered
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Fast Delivery
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Window Replacement
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Residential Windows
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Custom Window Designs
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Aluminum Window Frames
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Stained Glass
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Commercial Windows
Seipp Roofing, LLC
Westminster, MD-
Price Transparency
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Timely Service
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Free assessment
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Good Customer Service
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Educational Website
Services Offered
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Window Replacement
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Custom Window Designs
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Commercial Windows
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Residential Windows
Classic Exteriors
Sykesville, MD-
Good Customer Service
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Free assessment
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Educational Website
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Price Transparency
Services Offered
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Window Replacement
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Aluminum Window Frames
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Commercial Windows
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Residential Windows
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Custom Window Designs
B.T. Window & Doors LLC
Sykesville, MD-
Educational Website
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Good Customer Service
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Free assessment
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Price Transparency
Services Offered
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Sliding Glass
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Residential Windows
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Window Replacement
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Custom Window Designs
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Energy-Efficient Options
Myers Building Product Specialists - Chambersburg
Chambersburg, PA-
Good Customer Service
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Timely Service
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Free assessment
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Price Transparency
Services Offered
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Commercial Windows
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Window Replacement
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Fast Delivery
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Residential Windows
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Glass Showers
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Custom Window Designs
Robert G. Miller
Hanover, PA-
Price Transparency
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Good Customer Service
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Educational Website
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Free assessment
Services Offered
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Aluminum Window Frames
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Double-Hung
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Glass Showers
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Window Replacement
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Residential Windows
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Custom Window Designs
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Fast Delivery
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Commercial Windows
Potomac View Energy
Sykesville, MD-
Price Transparency
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Free assessment
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Timely Service
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Good Customer Service
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Educational Website
Services Offered
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Stained Glass
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Residential Windows
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Double-Hung
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Energy-Efficient Options
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Glass Showers
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Custom Window Designs
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Window Replacement
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Sliding Glass
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Bay Windows
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Commercial Windows
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Fast Delivery
Window Expert
Germantown, MD-
Good Customer Service
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Educational Website
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Timely Service
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Price Transparency
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Free assessment
Services Offered
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Window Repair
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Commercial Windows
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Custom Window Designs
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Window Replacement
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Double-Hung
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Energy-Efficient Options
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Residential Windows
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Fast Delivery
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Sliding Glass
Pella Windows & Doors of Gaithersburg
Gaithersburg, MD-
Educational Website
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Good Customer Service
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Free assessment
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Price Transparency
Services Offered
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Window Replacement
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Residential Windows
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Custom Window Designs
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Double-Hung
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Full-Service Installations
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Sliding Glass
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Bay Windows
C2 Operations
Leesburg, VA-
Educational Website
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Good Customer Service
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Free assessment
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Price Transparency
Services Offered
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Sliding Glass
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Double-Hung
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Residential Windows
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Custom Window Designs
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Window Replacement
Capital Remodeling, Inc.
Gaithersburg, MD-
Price Transparency
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Free assessment
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Good Customer Service
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Educational Website
Services Offered
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Window Replacement
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Custom Window Designs
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Residential Windows
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Glass Showers
Peak Custom Remodeling
Baltimore, MD-
Timely Service
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Educational Website
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Good Customer Service
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Free assessment
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Price Transparency
Services Offered
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Window Replacement
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Fast Delivery
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Commercial Windows
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Sliding Glass
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Full-Service Installations
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Energy-Efficient Options
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Custom Window Designs
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Residential Windows
Calculate how much you can expect to pay for window installation and replacement in Thurmont, MD using our customized window cost calculator.
Estimates will vary based on window dimensions and other unique factors to your home. Getting in touch with a local window installer is the best way to get an accurate cost estimate for your home.
How Installing Energy-Efficient Windows in Thurmont Saves You Money
By upgrading to energy-efficient windows, you can take advantage of several benefits, such as:
- Protect your valuables: The low-emissivity coatings on many Energy Star certified windows help prevent the fading of your floors, carpets and furniture by filtering out UV rays.
- More efficient energy usage in your home: In Thurmont where the winters can get very cold, energy-efficient windows cut back on how much heat is lost through your windows, which makes it easier to keep your home warm.
- Protect your investment: When you have an older home, your windows could also be outdated or drafty. Upgrading your windows is an important part of maintaining your property and its value.
- Save money on power bills: After you upgrade to energy-efficient windows, you can see a reduction in your bills by about 12% because you'll need less energy to heat or cool your home.
Estimated Cost of Window Replacement in Thurmont
Windows come in varying shapes and sizes, so costs and services will differ tremendously. Here are the average costs and the primary services that you can find from window installation companies.
How Much Do New Windows Cost?
The average cost to install one window is about $600 but can range anywhere from $200 to $1,200. But costs will vary significantly based on the quality of your products, your location, the number of windows you need and the current condition of your home. Many window companies also offer replacement door installations and other add-ons like coating, shutters, baths and more. These extra services will increase your overall project costs.
Whether or not you pick energy-efficient windows is another factor that will affect the cost. These will almost always cost more than other windows, but on the other hand, you can save about $294 a year on your energy bills in Thurmont.
We advise requesting free quotes from several window companies to find the one that works best for you.
What Services do Window Installers Offer?
Generally, there are two kinds of window installation services companies offer: full-frame and pocket installations.
Full-frame installations are necessary when you want to change the style of your windows or your window has significant rot or deterioration. With this service, your installers will replace the entire window, including the trim, sill and frame. Pocket installations are on the simpler end and won't cost as much, as they entail merely replacing the window within its existing frame. But if the frame has any damage or deterioration, you may need a full-frame installation instead.
If you're unsure which type of window installation service you need, your installer should be able to advise you. In general, the choice is based on factors like the age and condition of the home, the type of building material, budget and time restrictions.
Best Availability
Renewal by Andersen
- Great industry reputation
- Member of US Green Building Council
- Manufactures products in-house
Window Veteran
Window World
- EnergyStar Partner
- Wide variety of products and services
- Lifetime Warranty
How We Choose the Best Window Installers in Thurmont
EcoWatch reviews are different from most reviews because we're examining these companies through a sustainability lens. Along with energy efficiency, we analyzed window companies all across the state and assigned rankings based on the following methodology:
Service Area
This one is self-explanatory, but we've chosen to highlight window installation companies that serve the Thurmont area so you can find the right window installation company near you.
Work Quality
We're willing to bet that you're not looking for a company to do a shoddy job installing windows. We've vetted each company in our guide to make sure its technicians are well-qualified and that the company has gotten lots of positive customer feedback to vouch for its service.
Customer Reviews
We analyzed trends in recent customer feedback to determine the companies with the most customer satisfaction, weighted by sample size. Customer satisfaction might be the factor we place the most value on, as it indicates the quality of services across nearly every category, including cost, quality of installation, quality of parts, warranty, professionalism and more.
Cost
This one is a give-and-take: as with most services, cheap window companies won't always provide the most quality service. Still, we want to ensure we're highlighting companies that provide a spectrum of price and financing options so they're accessible to most homeowners.
Warranty
As discussed, windows are a sizable investment, so you'll want to be certain that investment is well protected. Window installation companies that give you lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Because of Thurmont's climate, homeowners need to be wary of rot, water damage and low efficiency. We factored in local experience to reflect the ability of Thurmont window companies to prepare homes for these issues. If a company has less than 10 years of experience, it loses points in this category.
Thurmont, MD Window Replacement FAQs
What is the average cost to replace windows in a home?
The national average cost of replacing one window is around $600 but can range from $200 to $1,200, based on a variety of factors. The price is typically dependent on the location of your property, the type and material of the window and the size of the window. Also, keep in mind that energy-efficient windows may cost more initially but can save you hundreds of dollars a year in energy bills.
What are the most common types of replacement windows?
There are various kinds of windows you can get for your house, including casement windows, bay windows, slider windows, transom windows, double-hung and single-hung windows, picture windows and awning windows.
When should I use a window installation company?
Unless you have experience with home improvement projects and have all the tools you need to replace your own windows, we recommend hiring a professional. The window installation process is quite involved and can take anywhere from four to six hours for one window. Although it's tempting to try to do it yourself to save money, hiring a professional is a faster, more efficient and much safer option.
How long does it typically take to install windows?
Because the average installation time is 30 minutes per window, around 16 windows can be installed during a typical 8-hour work day.