20 Best Window Companies in Terrell, TX (2024 Reviews)

Looking to upgrade your home's windows? We’ve got you covered in this guide to the top window installation companies.

We analyzed all the top-rated window companies in Terrell 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 Terrell may not seem like the most captivating article on the EcoWatch site, but trust us, windows have more of an impact on your life than you might realize. Potential leaks or drafts from your windows can make your home uncomfortable in the summer or winter.

That’s also bad for the environment, as the additional energy required by damaged windows increases your carbon footprint.

So if you’re constructing a new home, renovating or replacing your windows in Terrell, you’ve found the best place to get started.

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 Terrell

The EcoWatch Reviews team researched dozens of installers in Terrell to find the best window installation companies for our readers. The installers we’ve mentioned in this article passed our review standards for energy-efficient offerings as well as customer service, local expertise, price and beyond.

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 is 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 provides services to 200 locations nationwide. The company has plenty of glowing reviews from customers online.

It has established itself as a company that 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 Windows

There are a wide range 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 Terrell?

Window World doesn’t have any pricing information displayed on its website, but it's known for offering some of the most affordable window installations around. You can ask for a free quote on its website for more information about pricing.

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 is a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. This window installation company has been operating since 1995 and currently provides services to nearly every state except Mississippi and West Virginia. The company has plenty of glowing reviews from customers online.

It has established itself as a company 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

There are a wide range of window types that Renewal by Andersen offers, some of which are Energy Star products. 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 Terrell?

Andersen doesn’t have any pricing information displayed 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. You can ask for a free quote on its website for more information about pricing.

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 is 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 provides services to 27 states nationwide. The company has plenty of glowing reviews from customers online.

It has established itself as a company that has an industry-leading warranty covering products, parts and workmanship for life.

Energy Efficiency of Universal Windows Direct Windows

There are a wide range of window types that Universal Windows Direct offers, some of which are Energy Star products. 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 Terrell?

Universal doesn’t have any pricing information displayed on its website, but 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. You can ask for a free quote on its website for more information about pricing.

Texas Window Store logo
FAST QUOTE
as little as 30 seconds
Great Local Choice

Texas Window Store

★★★★★
BBB Rating: A+
Locations: Texas-Specific
Founded: 2018
Pros:
  • Pros icon Low prices relative to competitors
  • Pros icon Low number of customer complaints
  • Pros icon Wide variety of products and services
  • Pros icon Limited service area
Cons:
  • Pros icon Young company

Texas Window Store is not a physical store and does not manufacture its own products, but it does work with brand-name window and door suppliers. This window installation company has been operating since 2018 and currently provides services to Austin, Waco and surrounding areas. The company has plenty of glowing reviews from customers online.

It has established itself as a company that has dedicated customer service and can carry out an installation in a timely manner.

Energy Efficiency of Texas Window Store Windows

There are a wide range of window types that Texas Window Store offers, some of which are Energy Star products. It carries a wide variety of name-brand windows, including Andersen and Pella, so the company has many energy-efficient options.

How much does Texas Window Store cost in Terrell?

Texas Window Store doesn’t have any pricing information displayed on its website, but it pitches your project to a group of window manufacturers, and says window costs are typically based on five factors: size, type, material, geographical region and dealer/reseller. You can ask for a free quote on its website for more information about pricing.

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 is 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 provides services to residents within 75 miles of its showrooms, which are in 13 states. The company has plenty of glowing reviews from customers online.

It has established itself as a company 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 Terrell?

Window Nation doesn’t have any pricing information displayed 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. You can ask for a free quote on its website for more information about pricing.

We strive to stay unbiased and transparent by including pros and cons for every provider. Additionally, any partnerships do not influence our reviews.

More Window Companies in Terrell

Renewal by Andersen Window Replacement

Carrollton, TX
4.8
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Andersen
  • Service icon Custom Window Designs
  • Service icon Bay Windows
  • Service icon Sliding Glass Doors
  • Service icon Energy-Efficient Options
  • Service icon Aluminum Frames
  • Service icon Window Install & Replacement

Website: https://dallaswindowsdoors.com/
Address: 1215 W Crosby Rd #180, Carrollton, TX 75006
Phone: (469) 217-9016

Window World of Dallas-Fort Worth

Richardson, TX
4.5
★★★★★
  • Pros icon Free assessment
  • Pros icon Timely Service
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

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

Website: https://www.windowworlddfw.com/
Address: 600 N Coit Rd, Richardson, TX 75080
Phone: (972) 623-9998

Champion Replacement Windows of Ft. Worth

Fort Worth, TX
4.3
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

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

Website: https://www.championwindow.com/Ft-Worth/
Address: 2951 Northern Cross Blvd #249, Fort Worth, TX 76137
Phone: (817) 349-7819

Window Nation

Grand Prairie, TX
4.6
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

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

Website: https://www.windownation.com/window-replacement-dfw/
Address: 2940 N Hwy 360 Suite 300, Grand Prairie, TX 75050
Phone: (469) 251-7464

General glass

Royse City, TX
3.1
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Tempered Glass
  • Service icon Window Repair
  • Service icon Aluminum Frames
  • Service icon Storm Doors
  • Service icon Energy-Efficient Options
  • Service icon Mirrors
  • Service icon Commercial Windows
  • Service icon Window Install & Replacement
  • Service icon Glass Showers

Website: https://www.glassrepairrockwall.com/
Address: 4904 TX-276, Royse City, TX 75189
Phone: (214) 391-9699

Factory To You Windows

Rockwall, TX
3.0
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Window Install & Replacement
  • Service icon Vinyl Frames
  • Service icon Energy-Efficient Options

Website: https://factorytoyouwindows.com/
Address: 4480 TX-276, Rockwall, TX 75032
Phone: (469) 698-9900

TrueSafe Renovations

Mesquite, TX
5
★★★★★
  • 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 Ply Gem
  • Service icon Window Repair
  • Service icon Commercial Windows

Website: http://www.truesaferenovations.com/
Address: 3939 US-80 Suite 472-A, Mesquite, TX 75150
Phone: (972) 449-7438

RDS Door & Windows

Garland, TX
5
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Pella
  • Service icon Energy-Efficient Options
  • Service icon Sliding Glass Doors
  • Service icon Custom Window Designs
  • Service icon Glass Doors
  • Service icon Window Install & Replacement

Website: http://www.rdswindows.com/
Address: 230 Range Dr, Garland, TX 75040
Phone: (972) 272-7527

Solar screen savers

Dallas, TX
5
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Install & Replacement

Website: http://solarscreensavers.com/
Address: 7019 Bates St, Dallas, TX 75227
Phone: (972) 679-0133

Foster Exteriors Window Company

Dallas, TX
4.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

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

Website: https://www.fosterexteriors.com/
Address: 1350 N Buckner Blvd #216, Dallas, TX 75218
Phone: (214) 319-8400

Superior Glass and Mirror

Canton, TX
4.9
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

  • Service icon Mirrors
  • Service icon Commercial Windows
  • Service icon Glass Showers
  • Service icon Window Install & Replacement

Website: https://www.superiorglass-mirror.com/
Address: 1330 W Dallas St, Canton, TX 75103
Phone: (903) 567-0922

Siding & More Construction Company

Royse City, TX
2.9
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

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

Website: https://www.sidingnmore.com/
Address: 1718 Ranch Rd, Royse City, TX 75189
Phone: (972) 635-0951

JPON Glass Company

Garland, TX
4.5
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Repair
  • Service icon Mirrors
  • Service icon Window Install & Replacement
  • Service icon Glass Doors
  • Service icon Glass Showers
  • Service icon Glass Repair
  • Service icon Aluminum Frames
  • Service icon Sliding Glass Doors
  • Service icon Commercial Windows

Website: http://jponglass.com/
Address: 2025 Old Mill Run, Garland, TX 75044
Phone: (214) 349-1400

Galaxy Building Services, Inc.

Suite 103, TX
3.3
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

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

Website: http://galaxy-build.com/
Address: 1331 US-80 East, Suite 103, Mesquite, TX 75150
Phone: (214) 693-3471

United Roofing & General Contractors

Dallas, TX
5
★★★★★
  • Pros icon Timely Service
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Residential Windows
  • Service icon Window Install & Replacement
  • Service icon Commercial Windows

Website: http://unitedroofers.co/
Address: 325 North St. Paul Street Suite 2100, Dallas, TX 75201
Phone: (469) 783-8064

Apple Roofing

Plano, TX
4.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Timely Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Install & Replacement
  • Service icon Residential Windows
  • Service icon Commercial Windows

Website: https://appleroof.com/dallas/
Address: 3001 E Plano Pkwy #100, Plano, TX 75074
Phone: (469) 908-4323

Southern Pride Openings LLC

Rowlett, TX
3.4
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Free assessment

Services Offered

  • Service icon Aluminum Frames
  • Service icon Vinyl Frames
  • Service icon Glass Doors
  • Service icon Window Install & Replacement

Website: http://www.southernprideopenings.com/
Address: 5101 Gordon Smith Dr, Rowlett, TX 75088
Phone: (972) 475-9500

Southwest Door & Window

Dallas, TX
4.3
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Aluminum Frames
  • Service icon Sliding Glass Doors
  • Service icon Weather Shield
  • Service icon Vinyl Frames
  • Service icon Window Install & Replacement

Website: https://southwestdw.com/
Address: 10255 Miller Rd, Dallas, TX 75238
Phone: (214) 341-2212

Acri Windows & Doors

Rowlett, TX
3.1
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

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

Website: http://www.acri.com/
Address: 4800 Edgewater Dr, Rowlett, TX 75088
Phone: (214) 550-0419

Andersen Windows

Garland, TX
4.1
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

  • Service icon Commercial Windows
  • Service icon Glass Doors
  • Service icon Double-Hung
  • Service icon Window Install & Replacement
  • Service icon Fiberglass Frames
  • Service icon Storm Doors
  • Service icon Aluminum Frames
  • Service icon Andersen
  • Service icon Bay Windows
  • Service icon Sliding Glass Doors
  • Service icon Impact Windows

Website: https://www.andersenwindows.com/
Address: 3801 Regency Crest Dr, Garland, TX 75041
Phone: (214) 221-9500
Terrell Window Cost Calculator

Calculate how much you can expect to pay for window installation and replacement in Terrell, TX 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 Terrell Saves You Money

Switching to energy-efficient windows can improve the comfort of your home and help you save on power bills. Here are more details about how upgrading your windows could benefit you:

  • Protect your valuables from fading: The low-emissivity coatings on many energy-efficient windows filter out damaging UV rays, preventing your furniture, carpet and other valuables from fading.
  • Reduce your carbon footprint: In Terrell, you can lower your indirect greenhouse gas emissions by about 507 pounds per year after you install energy-efficient windows.
  • Save money on energy bills: Once you install energy-efficient windows, you can expect a reduction in your bills by about 12% because you’ll require less energy to heat or cool your house.
  • Protect your investment: The older your home is, the more likely you are to benefit from switching to energy-efficient windows. Older homes usually have windows that are outdated, leaky or maybe even damaged in some way. Updating your windows could help increase the value of your home if you decide to sell.

Estimated Cost of Window Replacement in Terrell

Each window installation company provides varying services and has varying price points depending on several factors.

How Much Do New Windows Cost?

Even though the national average cost to install a single window is around $600, it can range anywhere from $200 to $1,200. How much it will cost varies based on several factors, including number of windows, size, type, the location of your home, material and more.

Whether or not you pick energy-efficient windows is another factor that will determine the cost. These will almost always cost more than other windows, but on the other hand, you can save about $384 a year on your energy bills in Terrell.

Asking for free quotes from multiple installers is the best way to figure out which one will work best for your budget.

What Services do Window Installers Offer?

In general, there are two kinds of window replacement services companies offer: full-frame and pocket installations.

A full-frame installation is a total window replacement. It involves removing the old window, the windowsill, and the exterior and interior trim. It also involves additional materials, including insulation and drip edges, which raise the total cost of the project. Also worth noting: you may have to touch up the paint surrounding 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 on the simpler end and won’t carry as large a bill, but you can’t do this kind of installment if you have any pre-existing rot or water damage.

Your window replacement company should be able to help you decide what’s best for your needs. In Terrell, the decision will mostly be based on the age of your home and if there’s any damage. Wood can decay if it’s not maintained properly over the years, so it’s good to have a professional examine your frames and window sills.

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 Terrell

EcoWatch reviews differ from most reviews, as we examine these companies through a sustainability lens. We’ve assessed the top window replacement companies in Terrell primarily based on energy efficiency, as it’s what’s best for the environment and for you as a homeowner. 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

Since this is a guide for Terrell, we only included companies that cover the city. There are certainly other reputable providers that didn’t make the list because they wouldn’t be able to serve homeowners in Terrell.

Work Quality

When picking new windows, the quality and variety of services can often play just as important of a role in overall efficiency and performance as the brand of window you opt for. We do give window installers higher marks if they offer high-quality products, but we also factor in workmanship as reflected in customer feedback.

Customer Reviews

We analyzed patterns in recent online reviews to find the companies with the highest rates of customer satisfaction. Customer satisfaction may be the factor we place the most value on, as it indicates the quality of services across most other categories, including professionalism, warranty, quality of installation, quality of parts, cost and more.

Cost

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

Warranty

Protecting your investment in new windows is important. That’s why window installation companies that provide lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.

Years of Experience

Due to Terrell’s climate, homeowners need to be wary of water damage, rot and low efficiency. We factored in local experience to reflect the ability of Terrell window companies to prepare homes for these issues. If a company has less than 10 years of experience, it loses points in this category.

Terrell, TX Window Replacement FAQs

How much does window installation cost?

The average cost to replace a window ranges between $450 and $650. There are several factors that influence the price, such as how energy-efficient the windows are, styles and sizes of windows, the materials used in designing the windows, your property’s location, the number of windows and local labor costs.

What type of window is the most energy-efficient?

A window’s energy efficiency is affected by several factors, such as 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.

Do you really need to use a window installation company?

Unless you have experience with home improvement projects and have the tools needed to replace your own windows, we recommend hiring the pros. The process of installing windows is complex and can take anywhere from four to six hours for one window. Although it’s tempting to try to save some money by doing it yourself, hiring a professional is a faster, more efficient and much safer option.

What time of year is a good time to replace my windows?

Even though you can install windows any time of year, warmer weather is usually better for installing replacement windows. In addition, the weather should be dry, because rain can make the installation harder.

How often do you need to replace windows?

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

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