13 Best Window Companies in St. Marys, PA (2025 Reviews)
Looking to improve your property’s look? The best window replacement companies can help.
We analyzed all the top-rated window companies in St. Marys and selected the best 13 based on:
Customer reviews- Window installation expertise
- Popularity with home-owners like you
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Why you can trust EcoWatch
The EcoWatch team is all about finding solutions for eco-conscious homeowners in St. Marys. The Department of Energy estimates that heat gained or lost through traditional or outdated windows could make up around 30% of heating and cooling use. In St. Marys, where the electricity bills are an average of $28 per month, that’s almost $$101 per year wasted.
That’s bad news for your bank account and the environment, but one of the best window installation companies can help you with that.
Efficient windows are particularly important in St. Marys, where winters are long and cold. According to Energy Star, making the switch to energy-efficient windows can save the average homeowner up to $348 each year.
Best Availability
Renewal by Andersen
- Great Industry Reputation
- Award-winning Company
- Member of US Green Building Council
- Manufactures products in-house
Power Home
- Uses eco-friendly materials
- Well-trained, certified installers
- Lifetime or lengthy warranty
Best for Residential Windows
Window Nation
- Custom Designs
- Wide variety of products and services
- Manufactures products in-house
Best Window Installation & Replacement Companies in St. Marys
The EcoWatch team assessed many installers in St. Marys to find the best ones for our readers. We assessed the installers on energy-efficient offerings, customer service, local experience, price, coverage area and more.
Window World
EnergyStar Partner- Large serice area
- Low prices relative to competitors
- Great industry reputation
- Lifetime warranty
Quality of service will depend on your area
Window World provides windows expertise in St. Marys. It's the largest window replacement company in the country, known for its vinyl windows and affordability. This provider has 27 years of experience in the window installation business, and it has established itself as one of the best companies in St. Marys. Many positive reviews from customers online back the company's reputation.
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 WindowsWindow World 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. 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 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. The best way to get more accurate pricing information is to ask for a free quote from the company.
Renewal by Andersen
- Great industry reputation
- Award-winning company
- Member of US Green Building Council
- Manufactures products in-house
- No lifetime warranty
- More expensive than competition
Renewal by Andersen provides the best availability in St. Marys. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. This provider has 27 years of experience in the window installation business, and it has established itself as one of the best companies in St. Marys. Many positive reviews from customers online back the company's reputation.
It 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 St. Marys?Andersen does not outline 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. The best way to get more accurate pricing information is to ask for a free quote from the company.
Aeroseal Windows
- Many years of experience
- Great industry reputation
- Low number of customer complaints
- Manufactures products in-house
- Custom Designs
- No lifetime warranty
- Not ideal for residential installations
Aeroseal Windows provides the best window installation for businesses in St. Marys. It's 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 provider has 23 years of experience in the window installation business, and it has established itself as one of the best companies in St. Marys. Many positive reviews from customers online back the company's reputation.
It installs windows and doors at businesses across the Eastern U.S.
Energy Efficiency of Aeroseal Windows WindowsAeroseal Windows 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. 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?Aeroseal does not outline prices on its website, but it provides high-quality windows at a competitive price point. The best way to get more accurate pricing information is to ask for a free quote from the company.
Window Nation
- Award-winning company
- Manufactures products in-house
- Custom designs
- Wide variety of products and services
- Installation not covered by warranty
- Limited service area
Window Nation provides the best residential windows in St. Marys. It's 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 window installation business, and it has established itself as one of the best companies in St. Marys. Many positive reviews from customers online back the company's reputation.
It 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 St. Marys?Window Nation does not outline prices on its 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. The best way to get more accurate pricing information is to ask for a free quote from the company.
We’ve recommended providers with good reputations, but note that some national companies have independently owned locations in St. Marys, so your service may differ depending on your local crew. We have tried to remain unbiased and transparent by including pros and cons for every company we reviewed.
More Window Companies in St. Marys
Window World of Dubois
DuBois, PA- Good Customer Service
- Price Transparency
- Educational Website
- Free assessment
Services Offered
Glass Doors- Vinyl Frames
- Double-Hung
- Window Replacement/Installation
- Bay Windows
- Energy-Efficient Options
Pella Windows & Doors of State College
State College, PA- Price Transparency
- Good Customer Service
- Free assessment
- Educational Website
Services Offered
- Double-Hung
- Bay Windows
- Glass Doors
- Window Replacement/Installation
Window Perfections
Altoona, PA- Price Transparency
- Good Customer Service
- Free assessment
- Educational Website
Services Offered
- Window Repair
- Glass Doors
- Window Replacement/Installation
- Double-Hung
- Bay Windows
ASAP Glass
Olean, NY- Good Customer Service
- Timely Service
- Free assessment
- Educational Website
- Price Transparency
Services Offered
- Glass Repair
- Window Replacement/Installation
- Glass Doors
- Mirrors
- Glass Showers
Triangle Construction & Remodeling
Bellefonte, PA- Free assessment
- Price Transparency
- Educational Website
- Good Customer Service
Services Offered
- Window Replacement/Installation
D & S Glass Services Inc.
Jamestown, NY- Free assessment
- Good Customer Service
- Price Transparency
- Educational Website
Services Offered
- Glass Doors
- Glass Showers
- Vinyl Frames
- Energy-Efficient Options
- Glass Repair
- Mirrors
- Window Replacement/Installation
Burke & Sons Inc.
Punxsutawney, PA- Free assessment
- Price Transparency
- Good Customer Service
- Educational Website
Services Offered
- Screen Repair
- Window Replacement/Installation
Glass Doctor of State College
Boalsburg, PA- Price Transparency
- Good Customer Service
- Educational Website
Services Offered
- Glass Repair
- Glass Showers
- Window Repair
- Mirrors
- Energy-Efficient Options
- Custom Glass
- Window Replacement/Installation
Jamestown Glass Service, LLC
Jamestown, NY- Free assessment
- Price Transparency
Services Offered
- Mirrors
- Window Replacement/Installation
- Glass Showers
- Glass Repair
- Storm/Impact Windows
- Glass Doors
- Energy-Efficient Options
Thermal-Gard Building Products, Inc.
Punxsutawney, PA- Good Customer Service
- Price Transparency
Services Offered
- Window Replacement/Installation
- Energy-Efficient Options
- Double-Hung
- Bay Windows
- Glass Doors
Home Services at The Home Depot
Franklin, PA- Price Transparency
- Educational Website
- Good Customer Service
- Free assessment
Services Offered
- Vinyl Frames
- Glass Showers
- Glass Doors
- Screen Repair
- Custom Window Designs
- Energy-Efficient Options
- Storm/Impact Windows
- Window Replacement/Installation
Hope's Windows, Inc.
Jamestown, NY- Good Customer Service
- Price Transparency
- Educational Website
- Free assessment
Services Offered
- Glass Doors
- Energy-Efficient Options
- Skylights
- Window Replacement/Installation
- Double-Hung
D & S Glass Services Inc.
Jamestown, NY- Price Transparency
- Educational Website
- Free assessment
- Good Customer Service
Services Offered
- Glass Repair
- Vinyl Frames
- Window Replacement/Installation
- Glass Doors
- Mirrors
- Energy-Efficient Options
- Glass Showers
Calculate how much you can expect to pay for window installation and replacement in St. Marys, PA 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 St. Marys Saves You Money
When you upgrade to energy-efficient windows, you may see a few benefits, including:
- Reduce your carbon footprint: Since energy-efficient windows improve the insulation in your home, you can reduce your carbon footprint by about 12%, according to Energy Star.
- Save on energy bills: According to the Department of Energy, heat gained or lost through windows accounts for around 25-30% of household energy use. Switching to energy-efficient models can help decrease how much energy is used in your home, therefore saving you about 12% more on your bills.
- Protect your valuables: Many energy-efficient windows have low-emissivity coatings, which not only provide better insulation for your home, but also filter out damaging UV rays, preventing fading of your furniture, carpet and other valuables.
- Protect your investment: The older your home is, the more likely you are to benefit from switching to energy-efficient windows. Older homes tend to have windows that are outdated, leaky or maybe even damaged in some way. Updating your windows could help raise the value of your home if you decide to sell.
Estimated Cost of Window Replacement in St. Marys
Each window installation company provides varying services and has varying prices based on a few factors.
How Much Do New Windows Cost?
According to our research, the national average cost of replacing a single window is about $600. However, window installation costs can range from $200 to $1,200 per window. But costs will differ significantly based on the number of windows you need, the current condition of your home, the quality of your products and your location. Many window companies also offer door installations and other add-ons like shutters, coating, baths and more. Additional services will increase your overall project costs.
With windows, efficiency is one of the most important factors for most homeowners. Efficient windows may cost more off the bat, but by increasing the efficiency of your home — particularly during the winter — they can give you decades of energy savings. According to Energy Star, buying certified energy-efficient windows can save St. Marys homeowners $348+ a year after replacing single-pane windows.
How much your window installation costs will also vary based on the type of window material you choose for the frames. Wood windows are usually the most expensive, though it depends on whether they are completely wood or clad with aluminum or vinyl. Fiberglass windows also tend to be a bit more expensive than vinyl, but they are more efficient.
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 a new style or your window has a lot of deterioration. With this service, your installers will replace the whole window, including the trim, frame and sill. A pocket installation entails replacing a window within the existing frame, which is usually less expensive than a full-frame installation.
Your window installer should be able to help you decide which type of installation you need.
Best Availability
Renewal by Andersen
- Great Industry Reputation
- Award-winning Company
- Member of US Green Building Council
- Manufactures products in-house
Power Home
- Uses eco-friendly materials
- Well-trained, certified installers
- Lifetime or lengthy warranty
Best for Residential Windows
Window Nation
- Custom Designs
- Wide variety of products and services
- Manufactures products in-house
How We Choose the Best Window Installers in St. Marys
The EcoWatch Reviews team differs from other reviewers, as we evaluate these companies through a sustainability lens. Along with energy efficiency, we analyzed window companies all across the state and ranked them based on the following methodology:
Service Area
This one is pretty self-explanatory, but we’ve chosen to highlight window installers that serve the St. Marys area so you can find the best 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 included in our guide to ensure its contractors are well-qualified and that the company has gotten plenty of positive customer feedback to vouch for its service.
Customer Reviews
Another self-explanatory yet very important review factor is customer feedback. If most customers don’t have positive feedback about their experience with a certain company, you won’t see it featured on EcoWatch.
Cost
This one is a give-and-take: as with other services, cheap window installation companies are not going to provide the highest quality service. Still, we want to make sure we’re highlighting companies that provide a wide range of price and financing options so they’re accessible to most homeowners.
Warranty
Protecting your investment in new windows is important. For that reason, window installation companies that offer lengthy warranties for products, parts and labor rank higher with EcoWatch.
Years of Experience
Lastly, we like to see companies that have a good track record in the industry. Window installers that have more experience are going to earn higher rankings by our standards. We like to see at least ten years of experience.
St. Marys, PA Window Replacement FAQs
What is the typical cost to install windows in a home?
The national average cost to install a single window is about $600 but can range between $200 and $1,200, depending on several factors. The price is typically influenced by the location of your property, the size of the window and the type and material of the window. Also, keep in mind that energy-efficient windows may cost more upfront but can save you hundreds of dollars a year in energy bills.
What type of window is the most energy-efficient?
A window’s energy efficiency depends on a number of factors, including the quality of the installation and what kind of window it is. Look for Energy Star Certified windows — these are often the most energy-efficient since they are certified by the U.S. Department of Energy.
When should I use a window installation company?
You should use a window installation company whenever you want new windows. Installing windows is a involved process that can be difficult and time-consuming, so it’s best handled by the professionals.
How often should you replace your windows?
Windows have an average lifespan of about 20 to 30 years. If your windows are older than that, then 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.
Should I replace my windows all at the same time?
If your windows are more than 20 years old, it’s most likely time to replace all of them. By that point, they are typically less efficient, draftier and/or more damaged than new windows. Replacing your windows all at the same time will involve less paperwork and less time.