20 Best Window Companies in Oak Lawn, IL (2024 Reviews)

When you need to replace your windows, our list of the best window installation companies can help you find the right provider for you.

We analyzed all the top-rated window companies in Oak Lawn and selected the best 20 based on:

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

By EcoWatch Local Advisors

Updated February 01, 2024

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.

A review of the best window installation companies in Oak Lawn may not seem like the most captivating article on the EcoWatch site, but trust us, windows have a more direct impact on your life than you might realize. If your house has old or damaged windows, your AC or heating system could be working overtime to heat or cool your house. This means spending more on energy bills.

That’s not great for your wallet or the environment, but one of the top window installation companies can help with that.

We’ve made this list of the best installation companies to help you in your search, so you can not only take advantage of brand-new windows, but also save money on your electric bills.

Best Availability

Renewal by Andersen

★★★★★
4.5

  • Great industry reputation
  • Member of US Green Building Council
  • Manufactures products in-house

Best Energy-Efficient Features

Champion

★★★★★
4.5

  • Many years of experience
  • Low prices relative to competitors
  • Limetime warranty

Window Veteran

Window World

★★★★★
4.5

  • EnergyStar Partner
  • Wide variety of products and services
  • Lifetime Warranty

Best Window Installation & Replacement Companies in Oak Lawn

The EcoWatch Reviews team researched many window installation companies across Oak Lawn to narrow our list down to the top ones. The providers in this article scored the best in our review categories, such as energy-efficient offerings, price, customer service, local expertise, availability and more.

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 Great industry reputation
  • Pros icon Award-winning company
  • Pros icon Member of US Green Building Council
  • Pros icon Manufactures products in-house
Cons:
  • Pros icon No lifetime warranty
  • Pros icon More expensive than competition

Renewal by Andersen provides the best availability in Oak Lawn. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. This window installation company has been operating since 1995 and currently services nearly every state except Mississippi and West Virginia.

If you’re looking for a company that uses in-home estimates and advanced digital tools to help you plan and visualize your project before getting started, this may be the provider for you.

Energy Efficiency of Renewal by Andersen Windows

Renewal by Andersen offers some Energy Star windows, but note that not all its windows are energy-efficient, so be sure to mention that you want high-quality 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 Oak Lawn?

Prices are not available on Andersen’s website because the cost of window replacement differs 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 detailed information on pricing, you can request a quote from the company.

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

Window World

★★★★★
BBB Rating: A+
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon EnergyStar Partner
  • Pros icon Large serice area
  • 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 provides windows expertise in Oak Lawn. It's the largest window replacement company in the country, known for its vinyl windows and affordability. This window installation company has been operating since 1995 and currently services 200 locations nationwide.

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 provider for you.

Energy Efficiency of Window World Windows

Window World offers some Energy Star windows, but note that not all its windows are energy-efficient, so be sure to mention that you want high-quality 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 Oak Lawn?

Prices are not available on Window World’s website because the cost of window replacement differs based on how many and what type(s) of windows you need. However, it's known for offering some of the most affordable window installations around. For more detailed information on pricing, you can request a quote from the company.

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 Award-winning company
  • Pros icon Manufactures products in-house
  • Pros icon Custom designs
  • Pros icon Wide variety of products and services
Cons:
  • Pros icon Installation not covered by warranty
  • Pros icon Limited service area

Window Nation provides the best residential windows in Oak Lawn. It's a company that serves hundreds of thousands of homeowners, mostly in the mid-Atlantic region of the U.S. This window installation company has been operating since 2006 and currently services residents within 75 miles of its showrooms, which are in 13 states.

If you’re looking for a company that gives customers the opportunity to view products and to speak to a representative in person in its showrooms, this may be the provider for you.

Energy Efficiency of Window Nation Windows

Window Nation offers some Energy Star windows, but note that not all its windows are energy-efficient, so be sure to mention that you want high-quality 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 Oak Lawn?

Prices are not available on Window Nation’s website because the cost of window replacement differs 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 detailed information on pricing, you can request a quote from the company.

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 Oak Lawn. It's a company that has grown immensely since its inception in 2002, and now has several franchise dealers nationwide. This window installation company has been operating since 2002 and currently services 27 states nationwide.

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

Energy Efficiency of Universal Windows Direct Windows

Universal Windows Direct offers some Energy Star windows, but note that not all its windows are energy-efficient, so be sure to mention that you want high-quality Energy Star windows when inquiring. 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.

How much does Universal Windows Direct cost in Oak Lawn?

Prices are not available on Universal’s website because the cost of window replacement differs 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 detailed information on pricing, you can request a quote from the company.

We strive to remain unbiased and transparent by including pros and cons for every company we review. Additionally, our rankings are not influenced by any partnerships.

More Window Companies in Oak Lawn

Renewal by Andersen of Chicago

Lockport, IL
4.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Andersen
  • Service icon Custom Window Designs
  • Service icon Double-Hung
  • Service icon Skylights
  • Service icon Commercial Windows
  • Service icon Sliding Glass Doors
  • Service icon Bay Windows
  • Service icon Window Install & Replacement

Website: https://www.renewalbyandersen.com/window-company/080-chicago-il/about-us
Address: 14503 S Gougar Rd #800, Lockport, IL 60491
Phone: (866) 836-2764

Window World Western Chicago

Lisle, IL
4.9
★★★★★
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Good Customer Service

Services Offered

  • Service icon Bay Windows
  • Service icon Double-Hung
  • Service icon Window Install & Replacement
  • Service icon Sliding Glass Doors

Website: https://www.windowworldwesternchicago.com/
Address: 4646 Western Ave, Lisle, IL 60532
Phone: (331) 903-6873

Window Nation

Romeoville, IL
4.5
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

  • Service icon Window Install & Replacement
  • Service icon Sliding Glass Doors
  • Service icon Energy-Efficient Options
  • Service icon Bay Windows
  • Service icon Vinyl Frames

Website: https://www.windownation.com/chicago_showroom/
Address: 1263 Lakeview Dr, Romeoville, IL 60446
Phone: (815) 306-8024

Window & Door Superstore

Oak Forest, IL
4.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Storm Doors
  • Service icon Window Install & Replacement

Website: https://www.windowdooroakforest.com/
Address: 6280 159th St, Oak Forest, IL 60452
Phone: (708) 535-3900

Valdicass Inc.

Brookfield, IL
4.9
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Marvin
  • Service icon Window Repair
  • Service icon Pella
  • Service icon Andersen
  • Service icon Window Install & Replacement

Website: https://www.valdicass.com/
Address: 8920 47th St, Brookfield, IL 60513
Phone: (708) 255-5231

Gilkey Window Company - Chicago Ridge

Chicago Ridge, IL
4.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Timely Service

Services Offered

  • Service icon Window Install & Replacement
  • Service icon Double-Hung
  • Service icon Fiberglass Frames
  • Service icon Window Repair
  • Service icon Vinyl Frames
  • Service icon Glass Doors
  • Service icon Sliding Glass Doors

Website: https://www.gilkey.com/location/chicago-ridge-il/
Address: 10160 Virginia Ave, Chicago Ridge, IL 60415
Phone: (708) 229-2340

Ferguson Industries the Original Door & Window Super Store

Orland Park, IL
4.8
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

  • Service icon Pella
  • Service icon Window Install & Replacement
  • Service icon Fiberglass Frames
  • Service icon Commercial Windows
  • Service icon Marvin

Website: http://fergusondws.com/
Address: 16065 South La Grange Road, Orland Park, IL 60467
Phone: (708) 478-6000

Next Door & Window

Burr Ridge, IL
4.8
★★★★★
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Good Customer Service

Services Offered

  • Service icon Storm Doors
  • Service icon Aluminum Frames
  • Service icon Fiberglass Frames
  • Service icon Double-Hung
  • Service icon Glass Doors
  • Service icon Window Install & Replacement
  • Service icon Stained Glass
  • Service icon Bay Windows
  • Service icon Marvin

Website: https://www.nextdoorandwindow.com/
Address: 16W240 83rd St, Burr Ridge, IL 60527
Phone: (630) 323-6398

Best Windows Inc

La Grange Park, IL
4.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Window Install & Replacement
  • Service icon Bay Windows
  • Service icon Commercial Windows
  • Service icon Mirrors
  • Service icon Aluminum Frames
  • Service icon Window Repair

Website: http://bestwindows.net/
Address: 1112 Cleveland Ave, La Grange Park, IL 60526
Phone: (708) 204-2446

Evergreen Door & Window

Evergreen Park, IL
4.7
★★★★★
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Timely Service
  • Pros icon Free assessment

Services Offered

  • Service icon Sliding Glass Doors
  • Service icon Storm Windows
  • Service icon Window Install & Replacement
  • Service icon Storm Doors
  • Service icon Aluminum Frames
  • Service icon Bay Windows

Website: https://www.evergreenwindow.com/
Address: 3800 95th St, Evergreen Park, IL 60805
Phone: (708) 419-2116

Gigs Construction

Orland Park, IL
4.7
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Window Install & Replacement
  • Service icon Glass Showers
  • Service icon Residential Windows

Website: http://www.gigsconstruction.com/
Address: 14538 Poplar Rd, Orland Park, IL 60462
Phone: (708) 752-6976

USA Board Up & Glass Co.

Lyons, IL
4.7
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Vinyl Frames
  • Service icon Commercial Windows
  • Service icon Glass Doors
  • Service icon Glass Repair
  • Service icon Window Repair
  • Service icon Window Install & Replacement

Website: http://boardupandglasspros.com/
Address: 4320 1st Ave, Lyons, IL 60534
Phone: (888) 310-0006

Hardy Glass Block Panels

Chicago, IL
4.6
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Install & Replacement
  • Service icon Energy-Efficient Options
  • Service icon Glass Showers

Website: http://www.hardyglassblock.com/
Address: 717 W 103rd St, Chicago, IL 60628
Phone: (773) 779-6600

Lang Exterior

Chicago, IL
4.5
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Energy-Efficient Options
  • Service icon Sliding Glass Doors
  • Service icon Double-Hung
  • Service icon Window Repair
  • Service icon Window Install & Replacement
  • Service icon Vinyl Frames
  • Service icon Triple Pane Glass

Website: http://langexterior.com/
Address: 2323 W 59th St, Chicago, IL 60636
Phone: (773) 737-4500

Excel Windows

Tinley Park, IL
4.4
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Fiberglass Frames
  • Service icon Storm Doors
  • Service icon Window Install & Replacement
  • Service icon Wood Frames
  • Service icon Bay Windows
  • Service icon Double-Hung

Website: http://www.excelwindows.com/
Address: 7413 Duvan Dr #4, Tinley Park, IL 60477
Phone: (708) 636-9898

Midwest Windows Direct

Chicago, IL
4.5
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Repair
  • Service icon Storm Doors
  • Service icon Vinyl Frames
  • Service icon Energy-Efficient Options
  • Service icon Custom Window Designs
  • Service icon Fiberglass Frames
  • Service icon Bay Windows
  • Service icon Window Install & Replacement

Website: https://mymidwestwindows.com/
Address: 3256 W Ogden Ave, Chicago, IL 60623
Phone: (773) 786-9401

Defender Steel Door & Window Company Chicago

Cicero, IL
4.2
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Sliding Glass Doors
  • Service icon Commercial Windows
  • Service icon Aluminum Frames
  • Service icon Bay Windows
  • Service icon Window Install & Replacement
  • Service icon Energy-Efficient Options
  • Service icon Storm Doors

Website: https://defenderdoor.com/
Address: 6119 W 35th St, Cicero, IL 60804
Phone: (708) 780-7320

Pegasus windows Inc.

Westchester, IL
5.0
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

  • Service icon Window Install & Replacement
  • Service icon Bay Windows

Website: http://www.pegasusinchicago.com/
Address: 1359 Newcastle Ave, Westchester, IL 60154
Phone: (708) 639-5217

AT Construction, Inc.

Orland Park, IL
5.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Timely Service
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Install & Replacement

Website: https://www.atconstructionil.com/
Address: 11726 Springbrook Ct, Orland Park, IL 60467
Phone: (708) 289-9655

Midway Windows & Doors Inc

Bedford Park, IL
4.1
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Install & Replacement
  • Service icon Vinyl Frames

Website: http://www.midwaywindows.com/
Address: 6750 S Belt Cir Dr, Bedford Park, IL 60638
Phone: (708) 594-2600
Oak Lawn Window Cost Calculator

Calculate how much you can expect to pay for window installation and replacement in Oak Lawn, IL using our customized window cost calculator.

Estimated Window Cost:
161 homeowners have requested a free estimate in the last 3 days.

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 Oak Lawn Saves You Money

By switching to energy-efficient windows, you and your family can enjoy several benefits, such as:

  • Save money on energy bills: The Department of Energy estimates that heat gained or lost through windows makes up about 25-30% of energy use in your home. Upgrading to energy-efficient windows can help lower that amount, which helps you save $295 a year on your bills.
  • Protect your investment: Upgrading and repairing your windows is an important part of maintaining your property and its real estate value, especially if your home is on the older side.
  • Decrease your carbon footprint: You can reduce your indirect greenhouse gas emissions by about 12% when you install Energy Star certified windows. In Oak Lawn, that’s about 449 pounds per year on average.
  • 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 your furniture, carpet and other valuables from fading.

Estimated Cost of Window Replacement in Oak Lawn

Let’s take a look at the cost of installing new windows and the kinds of services you may need for your home.

How Much Do New Windows Cost?

The typical cost to install a single window is about $600 but can range anywhere from $200 to $1,200. This is because window installations depend on several factors specific to your home, including the size, material and number of windows you need to replace, as well as where your property is located.

With windows, efficiency is one of the most important factors for most homeowners. Efficient windows may cost more upfront, but by increasing the efficiency of your home — especially during the summer and winter — they can give you decades of energy savings. According to Energy Star, buying certified energy-efficient windows can save Oak Lawn homeowners $295+ each year after replacing single-pane windows.

Something else that influences the total cost is the material you select for your frame. Aluminum frames are usually the least pricey and are sturdy and relatively maintenance-free, but they offer poor insulation. On the other hand, wood frames cost the most, as they are aesthetically pleasing and offer decent insulation. Fiberglass and vinyl frames provide good insulation as well and cost somewhere between the other two.

What Services do Window Installers Offer?

In general, there are two types of window replacement services companies offer: 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 extra materials, such as insulation and drip edges, which raise the total cost of the project. It’s also worth noting that it’s not uncommon for homeowners to have to touch up the paint around the window after a full-frame installation. Pocket installations are on the simpler end and won’t cost as much because they involve merely replacing the window within its existing frame. But if the frame has any damage or deterioration, you may have to get a full-frame installation instead.

If you’re still debating which type of installation to get, you can consult with your installer and get their advice. The decision mostly depends on how old the frames are and if there’s any damage present.

Best Availability

Renewal by Andersen

★★★★★
4.5

  • Great industry reputation
  • Member of US Green Building Council
  • Manufactures products in-house

Best Energy-Efficient Features

Champion

★★★★★
4.5

  • Many years of experience
  • Low prices relative to competitors
  • Limetime warranty

Window Veteran

Window World

★★★★★
4.5

  • EnergyStar Partner
  • Wide variety of products and services
  • Lifetime Warranty

How We Choose the Best Window Installers in Oak Lawn

In our hunt to find the most reliable, eco-friendly window installers in Oak Lawn, EcoWatch assessed dozens of companies before landing on these. We’ve evaluated the best window installation companies in Oak Lawn primarily based on their energy efficient offerings, as it’s the most sustainable option and the best one for homeowners. Energy Star certified windows have been shown to lower energy bills by hundreds of dollars. Along with energy efficiency, our rating methodology takes the following factors into consideration:

Service Area

Because this is a guide for Oak Lawn, we paid more attention to companies that provide services to the city. There are certainly reputable providers that didn’t make our list because they wouldn’t be able to serve homeowners in Oak Lawn.

Work Quality

When choosing new windows, the quality and variety of services can often play just as important of a role in overall efficiency and performance as the type of window you choose. We do give window installers more points if they offer high-quality products, but we also factor in workmanship as reflected in customer feedback.

Customer Reviews

Customer feedback is another very important review factor. If most customers don’t have positive things to say about their service from a certain installer, it won’t be featured on EcoWatch.

Cost

Cheaper windows don’t necessarily mean better windows, but we know many of our readers would like to keep costs low when possible. When analyzing the prices of providers, we gave higher scores to companies with reasonable prices and accessible financing rather than “cheaper” services.

Warranty

Protecting your investment in new windows is important to many homeowners. For that reason, window installation companies that offer lengthy warranties for products, parts and labor rank higher with EcoWatch.

Years of Experience

Last but not least, 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.

Oak Lawn, IL Window Replacement FAQs

How much should window installation cost?

The national average cost of replacing one window is around $600 but can range between $200 and $1,200, depending on several factors. The price is often influenced by the type and material of the window, the size of the window and the location of your property. 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 kind of window is the most energy-efficient?

A window’s energy efficiency is influenced by several factors, such as the quality of the installation and the kind of window. Look for Energy Star Certified windows — these are often the most energy-efficient and are certified by the U.S. Department of Energy.

When do I need to use a window installation company?

Unless you’re handy and have all the tools you need to replace your own windows, we recommend hiring a professional. The process of installing windows is complicated and can take anywhere from four to six hours for a single window. Although it’s tempting to try to save money by doing it yourself, hiring a company is a faster, more efficient and much safer option.

What time of year is the best time to replace my windows?

Replacement windows can be installed during any season, but autumn might be best. Regardless of when you install them, the contractors will take steps to ensure that too much hot or cold air doesn’t get into your home, so the temperature outside doesn’t necessarily matter that much. What’s more important than the temperature is that the weather should be dry.

How often do you need to 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. Apart from that, if your windows have damage anywhere on them, or they have become difficult to open or close, they may be in need of replacement.

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