23 Best Window Replacement Companies in St Marys, PA (2023 Reviews)
Window Companies Near Me

Looking to upgrade your windows? We've got all the information you need in this guide to the best window installation companies.

We analyzed all the top window installers in St Marys and selected the top 23 based on:

  • Customer reviews
  • Window replacement expertise
  • Popularity with home-owners like you
EcoWatch Local Advisors

By EcoWatch Local Advisors

Updated May 04, 2023

Why you can trust EcoWatch

Our panel of energy experts work tirelessly to create unbiased reviews and informative content to help homeowners make educated decisions. No other windows site has covered energy efficiency and sustainability as long as EcoWatch, which means we're going to help you find windows replacements that will save on your energy bill and put more money back in your wallet.

Whether you're doing renovations or have old windows, windows play a key role in conserving energy in your home. Damaged or outdated windows can cost you in energy bills.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 for the environment because the additional energy used by damaged windows increases your carbon footprint.

We've put together this list of the best installation companies to help you in your search, so you can not only enjoy brand new windows, but also save money on your energy bills.

Best Affordability

Window World

★★★★★
4.5

  • Low prices relative to competitors
  • Great industry reputation
  • Lifetime warranty
  • Quality of service will depend on your area

Best Overall

Renewal by Andersen

★★★★★
4.5

  • Member of US Green Building Council
  • Great industry reputation
  • Award-winning company
  • More expensive than competition

Best for Residential Windows

Window Nation

★★★★★
4

  • Wide variety of products and services
  • Custom designs
  • Manufactures products in-house
  • Limited service area

Best Window Replacement Companies in St Marys

The EcoWatch team assessed dozens of installers that service the St Marys area to find the best window installation companies that fit our standards. The companies in this article scored the best in our review categories, which include energy-efficient offerings, local expertise, availability, customer service, price and more.

Window World logo
FAST QUOTE
as little as 30 seconds
Best Affordability

Window World

★★★★★
BBB Rating: A+
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon Low prices relative to competitors
  • Pros icon Great industry reputation
  • Pros icon Lifetime warranty
Cons:
  • Pros icon Quality of service will depend on your area

Window World offers windows expertise in St Marys. It's the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has around 27 years of experience in the window replacement sector. Hundreds of positive reviews from customers online back the provider's reputation.

If you're looking for a company that is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital, this may be the perfect provider for you.

Energy Efficiency of Window World Windows

Window World is an Energy Star partner and offers a variety of energy-efficient windows. Note that not all of the company's windows are Energy Star certified, so be sure to ask your Window World representative when inquiring about services.

How much does Window World cost in St Marys?

Window World does not outline prices on its website, but it's known for offering some of the most affordable window installations around. You can inquire about a free quote on its website for more information about the cost.

Renewal by Andersen logo
FAST QUOTE
as little as 30 seconds
Best Overall

Renewal by Andersen

★★★★★
BBB Rating: A
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon Member of US Green Building Council
  • Pros icon Great industry reputation
  • Pros icon Award-winning company
Cons:
  • Pros icon More expensive than competition

Renewal by Andersen offers the best availability in St Marys. Andersen has about 27 years of experience in the window replacement business. Its reputation is backed by many positive reviews from customers online.

Andersen may be the company for you if you want 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 Windows

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. Not all of Andersen's offerings are Energy Star certified, so make sure you mention that you'd like Energy Star windows when inquiring.

How much does Renewal by Andersen cost in St Marys?

Andersen does not detail prices on its website, but based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. Getting a free quote on its website is the best way to get more accurate pricing information.

Window Nation logo
FAST QUOTE
as little as 30 seconds
Best for Residential Windows

Window Nation

★★★★★
BBB Rating: A
Locations: Regional
Founded: 2006
Pros:
  • Pros icon Wide variety of products and services
  • Pros icon Custom designs
  • Pros icon Manufactures products in-house
Cons:
  • Pros icon 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 company has 16 years of experience in the window installation industry, and it has become one of the most respected companies in St Marys. The provider has hundreds of positive reviews from customers on online review websites.

Window Nation may be the company for you if you want 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 Windows

There are a wide range of window types that Window Nation offers, some of which are Energy Star products. 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 St Marys?

Prices aren't displayed on Window Nation's website, but 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. Requesting a free quote on its website is the best way to know for sure.

Universal Windows Direct logo
FAST QUOTE
as little as 30 seconds
Best Warranty

Universal Windows Direct

★★★★★
BBB Rating: A
Locations: Nationwide
Founded: 2002
Pros:
  • Pros icon Makes charitable contributions
  • Pros icon Manufactures products in-house
  • Pros icon Wide variety of products and services
  • Pros icon Lifetime warranty
Cons:
  • Pros icon Limited service area
  • Pros icon Some installations carried out by third-party contractors
  • Pros icon Quality of service will depend on your area

Universal Windows Direct provides the best warranty in St Marys. It's a company that has grown immensely since its inception in 2002, and now has several franchise dealers nationwide. Universal has around 20 years of experience in the window installation business. Many positive reviews from customers online back the provider's reputation.

If you're looking for a company that has an industry-leading warranty covering products, parts and workmanship for life, Universal may be the perfect company for you.

Energy Efficiency of Universal Windows Direct Windows

The company offers energy-efficient UniShield brand windows. According to its website, UniShield window packages have higher gas fill rates and longer gas retention than most other brands on the market, and they are Energy Star products. Not all of Universal's offerings are Energy Star certified, so make sure you mention that you're interested in Energy Star windows when inquiring.

How much does Universal Windows Direct cost in St Marys?

Pricing information is not available on Universal's website because the cost of window installment varies greatly based on how many and what type(s) of windows you need. However, installations typically range from $225 to $425 per window based on customer feedback. That makes Universal Windows Direct more of a budget-friendly option for window repair and replacements. For more accurate information on pricing, you can get a quote from the company.

Aeroseal Windows logo
FAST QUOTE
as little as 30 seconds
Best for Businesses

Aeroseal Windows

★★★★★
BBB Rating: A+
Locations: Regional
Founded: 1999
Pros:
  • Pros icon Many years of experience
  • Pros icon Great industry reputation
  • Pros icon Low number of customer complaints
  • Pros icon Manufactures products in-house
  • Pros icon Custom Designs
Cons:
  • Pros icon No lifetime warranty
  • Pros icon 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. This company has 23 years of experience in the window installation industry, and it has established itself as one of the most reputable companies in the business. Its reputation is backed by a considerable amount of positive reviews on customer review websites.

If you're looking for a company that installs windows and doors at businesses across the Eastern U.S, Aeroseal may be the right provider for you.

Energy Efficiency of Aeroseal Windows Windows

Aeroseal Windows carries some Energy Star windows, but note that not all its windows are energy-efficient, so be sure to ask for high-quality Energy Star windows when inquiring. The company claims it helps businesses save on energy expenses and reduce their carbon footprints with energy-efficient windows, as well as practices like Low-E glass coating, weatherstripping and more.

How much does Aeroseal Windows cost in St Marys?

Prices aren't displayed on Aeroseal's website, but it provides high-quality windows at a competitive price point. The best way to get more accurate pricing information is to request a free quote from the company.

Please note that the following companies are national, which means the quality of customer service may vary depending on your local crew. We have tried to remain unbiased and transparent by describing both pros and cons for every provider.

More Window Replacement Companies in St Marys

Pella Windows & Doors of State College

State College, PA
4.0
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Bay Windows
  • Service icon Sliding Glass
  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Fast Delivery
  • Service icon Commercial Windows
  • Service icon Double-Hung

Website: https://www.pellabranch.com/pittsburgh/showrooms/pella-window-and-door-showroom-of-state-college/
Address: 164 Rolling Ridge Dr, State College, PA 16801
Phone: (814) 238-1902

D & S Glass Services Inc.

Jamestown, NY
3.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Glass Showers
  • Service icon Sliding Glass
  • Service icon Custom Window Designs
  • Service icon Full-Service Installations
  • Service icon Residential Windows
  • Service icon Aluminum Window Frames
  • Service icon Commercial Windows

Website: http://www.dsglass.com/
Address: 333 Fluvanna Ave, Jamestown, NY 14701
Phone: (716) 664-9321

Window Perfections

Altoona, PA
3.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Award-Winning
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Bay Windows
  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Commercial Windows
  • Service icon Double-Hung

Website: http://www.windowperfections.com/
Address: 1909 E Pleasant Valley Blvd, Altoona, PA 16602
Phone: (800) 237-4091

Home Services at The Home Depot

Franklin, PA
3.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Glass Showers
  • Service icon Bay Windows
  • Service icon Custom Window Designs
  • Service icon Stained Glass
  • Service icon Residential Windows
  • Service icon Fast Delivery
  • Service icon Commercial Windows
  • Service icon Double-Hung

Website: https://www.homedepot.com/l/Oil-City/PA/Franklin/16323/4178/services
Address: 6874 US-322, Franklin, PA 16323
Phone: (814) 208-7843

Home Services at The Home Depot

State College, PA
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Glass Showers
  • Service icon Bay Windows
  • Service icon Custom Window Designs
  • Service icon Stained Glass
  • Service icon Residential Windows
  • Service icon Fast Delivery
  • Service icon Commercial Windows
  • Service icon Double-Hung

Website: https://www.homedepot.com/l/Patton-Twp/PA/State-College/16803/6841/services
Address: 2615 Green Tech Dr, State College, PA 16803
Phone: (814) 208-7851

Home Services at The Home Depot

Jamestown, NY
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Glass Showers
  • Service icon Bay Windows
  • Service icon Custom Window Designs
  • Service icon Stained Glass
  • Service icon Residential Windows
  • Service icon Fast Delivery
  • Service icon Commercial Windows
  • Service icon Double-Hung

Website: https://www.homedepot.com/l/Jamestown/NY/Jamestown/14701/6154/services
Address: 935 Fairmount Ave, Jamestown, NY 14701
Phone: (716) 222-9072

Home Services at The Home Depot

Olean, NY
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Glass Showers
  • Service icon Bay Windows
  • Service icon Custom Window Designs
  • Service icon Stained Glass
  • Service icon Residential Windows
  • Service icon Aluminum Window Frames
  • Service icon Fast Delivery
  • Service icon Commercial Windows

Website: https://www.homedepot.com/l/Olean/NY/Olean/14760/6161/services
Address: 1900 Dan Eaton Dr, Olean, NY 14760
Phone: (716) 222-9073

Window World of Dubois

DuBois, PA
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Bay Windows
  • Service icon Sliding Glass
  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Double-Hung

Website: https://www.windowworlddubois.com/
Address: 9 Industrial Dr, DuBois, PA 15801
Phone: (814) 503-8426

ASAP Glass

Olean, NY
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Timely Service

Services Offered

  • Service icon Glass Showers
  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Commercial Windows

Website: https://asapglassofolean.com/
Address: 138 N Union St, Olean, NY 14760
Phone: (716) 904-3040

Jamestown Glass Service, LLC

Jamestown, NY
3.7
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Glass Showers
  • Service icon Sliding Glass
  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Aluminum Window Frames
  • Service icon Tempered Glass
  • Service icon Double-Hung
  • Service icon Commercial Windows

Website: http://jamestownglassservice.com/
Address: 1179 N Main St, Jamestown, NY 14701
Phone: (716) 484-0186

Western New York Glass & Door Co Inc

Olean, NY
3.7
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Glass Showers
  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Commercial Windows

Website: http://www.wnyglassndoor.com/
Address: 519 W State St, Olean, NY 14760
Phone: (716) 373-0585

D & S Glass

Ellicott, NY
3.7
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Glass Showers
  • Service icon Sliding Glass
  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Aluminum Window Frames
  • Service icon Commercial Windows

Website: https://www.dsglass.com/contact-us
Address: 333 Fluvanna Ave, Ellicott, NY 14701
Phone: (716) 351-3498

Thermo Twin Windows

Lakewood, NY
3.7
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Fast Delivery
  • Service icon Commercial Windows
  • Service icon Double-Hung

Website: https://www.thermotwin.com/index.html
Address: 318 E Fairmount Ave #510A, Lakewood, NY 14750
Phone: (800) 641-2211

Considine Window and Screen Repair Shop

Mill Hall, PA
3.7
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Aluminum Window Frames
  • Service icon Commercial Windows
  • Service icon Double-Hung

Website: https://www.facebook.com/ConsidineWindowandScreenRepair/
Address: 2026 Sugar Run Rd, Mill Hall, PA 17751
Phone: (570) 295-5081

Thermal-Gard Building Products

Punxsutawney, PA
3.6
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Energy-Efficient Options
  • Service icon Glass Showers
  • Service icon Bay Windows
  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Fast Delivery
  • Service icon Double-Hung

Website: http://www.thermal-gard.com/
Address: 400 N Walnut St, Punxsutawney, PA 15767
Phone: (814) 938-1408

Centre Glass

State College, PA
3.6
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Commercial Windows
  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Fast Delivery

Website: http://www.centre-glass.com/
Address: 1121 W College Ave, State College, PA 16801
Phone: (814) 237-3985

Burke & Sons Inc.

Punxsutawney, PA
3.6
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Energy-Efficient Options
  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Commercial Windows

Website: https://www.burke-sons.com/
Address: 110 Gaskill Ave, Punxsutawney, PA 15767
Phone: (814) 938-7303

Glass Doctor of State College

Boalsburg, PA
3.5
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Glass Showers
  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Commercial Windows
  • Service icon Double-Hung

Website: https://glassdoctor.com/state-college/
Address: 171 Technology Dr #500, Boalsburg, PA 16827
Phone: (814) 626-9100

PA Window Tint, Inc.

Bellefonte, PA
3.5
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Commercial Windows
  • Service icon Sliding Glass

Website: https://pawindowtint.com/
Address: 1960 E College Ave, Bellefonte, PA 16823
Phone: (814) 383-2245

Glass America-Jamestown, NY

Jamestown, NY
3.5
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Double-Hung
  • Service icon Commercial Windows

Website: https://www.glassusa.com/locations/ny/jamestown/
Address: 1315 Washington St, Jamestown, NY 14701
Phone: (716) 708-1998

Safelite AutoGlass

Bradford, PA
3.5
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Commercial Windows

Website: https://www.safelite.com/stores/Bradford
Address: 570 Chestnut St, Bradford, PA 16701
Phone: (814) 817-2054

MCM Windows and Doors Inc.

Clarion, PA
3.3
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Commercial Windows

Website: http://mcmwindowsanddoors.com/
Address: 14966 Rte 322, Clarion, PA 16214
Phone: (814) 764-3708

Glass Erectors Inc

Reynoldsville, PA
3.2
★★★★★
  • Pros icon Educational Website

Services Offered

  • Service icon Commercial Windows
  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Aluminum Window Frames

Website: https://glasserectorsinc.com/
Address: 315 E Main St, Reynoldsville, PA 15851
Phone: (814) 653-2652

How Installing Energy-Efficient Windows in St Marys Saves You Money

There are several benefits of upgrading to energy-efficient windows. Some reasons you may want to consider making the switch include the following:

  • Protect your investment: Keeping your windows up to date is an important part of maintaining your property and its real estate value, especially if your home is on the older side.
  • Save on power bills: Upgrading to energy-efficient windows reduces your energy bills by about 12% since you need less energy.
  • Decrease your carbon footprint: By using less energy once switching to Energy Star certified windows, you'll also be cutting your carbon dioxide emissions by about 12%, according to Energy Star.
  • Protect your valuables: Many Energy Star certified windows have low-emissivity coatings, which not only insulate your home better, but also filter out damaging UV rays, preventing your furniture, carpet and other valuables from fading.

Estimated Cost of Window Replacement in St Marys

Let's go over the cost of window replacement and the types of services offered by installers.

How Much Do New Windows Cost?

Typically, homeowners in St Marys can expect that most window installations will cost between $250 and $1,200, with the average cost at around $600. Costs will vary considerably based on the number of windows you need, the quality of your products, the current condition of your home and your location. A lot of window companies also offer replacement door installations and other add-ons like shutters, baths, coating and more. Additional services will increase your overall project costs.

With windows, efficiency is the most important factor for most homeowners. Windows with higher efficiency may cost more off the bat, but by increasing the efficiency of your home — especially during the winter — they can give you decades of energy savings. According to Energy Star, purchasing certified energy-efficient windows can save St Marys homeowners $348+ per year after replacing single-pane windows.

Costs will also vary based on the material you choose for your window frames. Aluminum frames cost the least. They're sturdy, light and easy to maintain, but offer poor insulation. Vinyl frames are somewhat expensive and offer good insulation. Composite frames made using wood fibers encased in plastic also offer good insulation and are moderately expensive. Wood frames are the most expensive and are the most in-demand. They're also aesthetically pleasing and offer decent insulation for your home.

What Services do Window Installers Offer?

Generally, there are two kinds of window installation services companies provide: full-frame and pocket installations.

A full-frame installation is a total window replacement. It involves taking out the old window, the windowsill, and the exterior and interior trim. It also involves additional materials, such as insulation and drip edges, which raise the overall cost of the project. It's also worth noting that you may have to touch up the paint around the window after a full-frame installation. Pocket installations (also known as retrofits) are when you replace a window without replacing the frame. Pocket installations are simpler and won't cost as much, but you can't do this type of installment if you have any pre-existing rot or water damage.

If you're not sure which kind of window installation service you need, your installer can assist you. Typically, the decision is influenced by factors like the age and condition of the home, the type of building material, budget and time restrictions.

Best Affordability

Window World

★★★★★
4.5

  • Low prices relative to competitors
  • Great industry reputation
  • Lifetime warranty
  • Quality of service will depend on your area

Best Overall

Renewal by Andersen

★★★★★
4.5

  • Member of US Green Building Council
  • Great industry reputation
  • Award-winning company
  • More expensive than competition

Best for Residential Windows

Window Nation

★★★★★
4

  • Wide variety of products and services
  • Custom designs
  • Manufactures products in-house
  • Limited service area

How We Choose the Best Window Installers in St Marys

In our hunt to make your home improvements easier and more eco-friendly in St Marys, the EcoWatch Reviews team chose the above companies as the top window installation companies in the city. We have evaluated the top window replacement companies in St Marys mostly based on their energy efficient offerings, as the most sustainable option also benefits homeowners in many ways. Energy Star certified windows have been shown to lower energy bills by hundreds of dollars. Along with energy efficiency, our rating methodology considers the following factors:

Service Area

This one is self-explanatory, but we've chosen to highlight window installers that serve a wide variety of states and cities so you can find the right window installation company near you.

Work Quality

We're certain that you're not looking for a company to do a shoddy job installing windows. We've vetted each installer featured on this list to make sure its contractors are well-qualified and that the company has received a lot of positive customer feedback to vouch for its service.

Customer Reviews

We analyzed trends in recent online reviews to find 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 most other categories, including quality of installation, warranty, quality of parts, professionalism, cost and more.

Cost

Cheaper windows certainly don't mean better windows, but we know many of our readers try to keep costs low when possible. When analyzing providers' prices, we gave higher points to companies with reasonable prices and accessible financing rather than "cheaper" services.

Warranty

As discussed previously, windows are a sizable investment, so you'll want to make sure that investment is protected. Window installation companies that provide lengthy warranties for products, parts and labor rank higher with EcoWatch.

Years of Experience

Because of St Marys' climate, homeowners will want to mitigate rot, low efficiency and water damage. We factored in local experience to reflect the ability of St Marys window companies to prepare homes for these issues. If a company has less than 10 years of experience, it loses points in this category.

St Marys, PA Window Replacement FAQs

How much does window installation cost?

The national average cost of replacing a single window is about $600 but can range from $200 to $1,200, based on a few different factors. The price is generally dependent on the type and material of the window, the size of the window and the location of your property. Also, bear in mind that energy-efficient windows may cost more initially but can save you hundreds of dollars a year in energy bills.

What kind of window is the most energy-efficient?

A window's energy efficiency is affected by a variety of factors, such as the quality of the installation and what kind of window it is. Look for Energy Star Certified windows — these are usually the most energy-efficient since they are certified by the U.S. Department of Energy.

What services do window installation companies provide?

Window installation professionals cover the entire process — from replacing old windows with brand new ones to cleaning up afterward. Additionally, a lot of companies offer window manufacturing, customization and repairs.

How often should you replace your windows?

Windows have a typical lifespan of about 20 to 30 years. If your windows are older than that, they probably need to be replaced. Other than that, if your windows have damage anywhere on them, or they have become difficult to operate, they may need to be replaced.

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