21 Best Window Replacement Companies in Vine Hill, CA (Feb 2023)
Window Companies Near Me

Looking to improve your property's energy efficiency? The top window replacement companies can help.

We analyzed all the top window installers in Vine Hill and selected the top 21 based on:

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

By EcoWatch Local Advisors

Updated January 12, 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.

A guide on the best window installation companies in Vine Hill may not seem like the most interesting article on the EcoWatch site, but trust us, windows have more of an impact on your life than you might realize. When it's the middle of summer, your outdated and leaky windows could be making your home harder to cool and costing you more in power bills.

Replacement windows improve your home's insulation, not only making you more comfortable during the summer and winter, but also saving you money and helping the environment.

We've put together a guide on the best installation companies to help you in your research, so you can not only take advantage of brand new windows, but also save money on your power bills.

Excellent Reputation

Milgard Windows & Doors

★★★★★
4.5

  • EnergyStar Partner
  • Wide network of installers
  • Lifetime warranty available
  • Limited additional services

Best Overall

Renewal by Andersen

★★★★★
4.5

  • Award-winning company
  • Great industry reputation
  • Manufactures products in-house
  • No lifetime warranty

Best Affordability

Window World

★★★★★
4.5

  • Lifetime warranty
  • EnergyStar Partner
  • Low prices relative to competitors
  • Quality of service will depend on your area

Best Window Replacement Companies in Vine Hill

The EcoWatch team assessed dozens of companies that serve the Vine Hill area to find the top window installation companies by our standards. The installers mentioned in this article scored the best in our review categories, such as energy-efficient offerings, customer service, price, availability, local expertise and more.

Milgard Windows & Doors logo
FAST QUOTE
as little as 30 seconds
Excellent Reputation

Milgard Windows & Doors

★★★★★
BBB Rating: A
Locations: West Coast
Founded: 1962
Pros:
  • Pros icon EnergyStar Partner
  • Pros icon Wide network of installers
  • Pros icon Lifetime warranty available
Cons:
  • Pros icon Limited additional services

Milgard Windows & Doors provides the best local installation in Vine Hill. Milgard has over 60 years of experience in the windows industry, and it currently serves Anaheim, Riverside, Los Angeles, San Bernardino and Orange counties. Hundreds of positive reviews on customer review websites back the company's reputation.

It has established itself as a company that offers competitive pricing, a comprehensive warranty and installers that all have a minimum of 15 years of window installation experience.

Energy Efficiency of Milgard Windows & Doors Windows

There are a wide range of window types that Milgard Windows & Doors offers, some of which are Energy Star products. The company manufactures its own products, which gives it the freedom to make custom windows based on the climate. The company designs its own vinyl compounds and profiles to ensure a heat-stable product that performs as advertised.

How much does Milgard Windows & Doors cost in Vine Hill?

Milgard does not display prices on its website, but it offers different kinds of windows at varying price points. You can request 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 Award-winning company
  • Pros icon Great industry reputation
  • Pros icon Manufactures products in-house
Cons:
  • Pros icon No lifetime warranty

Renewal by Andersen is a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has around 27 years of experience in the window installation business. Many positive reviews from customers online back the company's reputation.

You may want to consider going with Andersen if you're interested in a installer 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

Renewal by Andersen appeals to eco-conscious consumers by providing energy-efficient window offerings. 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 Vine Hill?

Even though prices are not readily available on Andersen's website, based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. Requesting a free quote on its website is the best way to get more accurate pricing information.

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

Window World

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

Window World provides windows expertise in Vine Hill. It's the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has about 27 years of industry experience, and it currently provides services to 200 locations nationwide. Hundreds of positive reviews on customer review websites back the provider's reputation.

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 variety of window types available from Window World, 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 Vine Hill?

While pricing information is not available on Window World's website, it's known for offering some of the most affordable window installations around. The best way to get more accurate pricing information is to get a free 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 Vine Hill. It's a company that has grown immensely since its inception in 2002, and now has several franchise dealers nationwide. This company has 20 years of experience in the window installation industry, and it has established itself as one of the most respected companies in Vine Hill.

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

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 windows are Energy Star certified, so be sure to mention that you're interested in Energy Star windows when inquiring.

How much does Universal Windows Direct cost in Vine Hill?

Universal doesn't have any prices available 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. Receiving a free quote on its website is the best way to know for sure.

We try to remain unbiased and transparent by mentioning pros and cons for each company we review. Additionally, our rankings are not affected by any partnerships.

More Window Replacement Companies in Vine Hill

The Glass Guru

Antioch, CA
4.4
★★★★★
  • Pros icon Consistent Workmanship
  • Pros icon Award-Winning
  • Pros icon No-Hassle Pricing
  • Pros icon Good Customer Service

Services Offered

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

Website: https://www.theglassguru.com/brentwood-ca/
Address: 2220 A St Suite A, Antioch, CA 94509
Phone: (925) 690-1947

Renewal by Andersen of San Francisco

Hayward, CA
4.3
★★★★★
  • Pros icon Price Transparency
  • Pros icon Timely Service
  • Pros icon Excellent Customer Service
  • Pros icon Dependable Service

Services Offered

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

Website: https://www.renewalbyandersen.com/window-company/890-san-francisco-ca/retailer
Address: 30806 Santana St, Hayward, CA 94544
Phone: (510) 803-3110

The Glass Guru

Fairfield, CA
4.3
★★★★★
  • Pros icon No-Hassle Pricing
  • Pros icon Educational Website
  • Pros icon Dependable Service
  • Pros icon No-fee Quotes

Services Offered

  • Service icon Residential Windows
  • Service icon Glass Showers
  • Service icon Tempered Glass
  • Service icon Custom Windows
  • Service icon Aluminum Window Frames
  • Service icon Full-Service Installations
  • Service icon Business Windows
  • Service icon Double-Hung
  • Service icon Sliding Glass

Website: https://www.theglassguru.com/fairfield-vacaville-ca/
Address: 1601 Enterprise Dr Unit 14, Fairfield, CA 94533
Phone: (707) 348-9539

Window Replacement San Leandro

San Leandro, CA
4.0
★★★★★
  • Pros icon Educational Website
  • Pros icon Dependable Service
  • Pros icon Arrives on Time
  • Pros icon Excellent Customer Service

Services Offered

  • Service icon Architectural Glass
  • Service icon Fast Delivery
  • Service icon Custom Window Designs
  • Service icon Double-Hung
  • Service icon Sliding Glass
  • Service icon Bay & Bow Windows

Website: https://bestexteriors.com/
Address: 1300 Fairmont Dr, San Leandro, CA 94578
Phone: (510) 722-0016

Best Exteriors

San Leandro, CA
4.0
★★★★★
  • Pros icon Free Quotes
  • Pros icon Consistent Workmanship
  • Pros icon Arrives on Time
  • Pros icon Price Transparency

Services Offered

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

Website: https://bestexteriors.com/
Address: 689 E 14th St, San Leandro, CA 94577
Phone: (510) 961-3697

Window Replacement Berkeley

Berkeley, CA
4.0
★★★★★
  • Pros icon Reliable Service
  • Pros icon Excellent Customer Service
  • Pros icon No-Hassle Pricing
  • Pros icon Educational Website

Services Offered

  • Service icon Architectural Glass
  • Service icon Fast Delivery
  • Service icon Custom Windows
  • Service icon Double-Hung
  • Service icon Sliding Glass
  • Service icon Bay & Bow Windows

Website: https://bestexteriors.com/
Address: 909 University Ave, Berkeley, CA 94710
Phone: (510) 722-0025

Best Exteriors

Oakland, CA
4.0
★★★★★
  • Pros icon No-Hassle Pricing
  • Pros icon Excellent Customer Service
  • Pros icon No-fee Quotes
  • Pros icon Timely Service

Services Offered

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

Website: https://bestexteriors.com/
Address: 1999 Harrison St #10219, Oakland, CA 94612
Phone: (877) 792-6065

Window Replacement Vallejo

Vallejo, CA
4.0
★★★★★
  • Pros icon Free Quotes
  • Pros icon Arrives on Time
  • Pros icon No-Hassle Pricing
  • Pros icon Excellent Customer Service

Services Offered

  • Service icon Architectural Glass
  • Service icon Fast Delivery
  • Service icon Custom Windows
  • Service icon Double-Hung
  • Service icon Sliding Glass
  • Service icon Bay & Bow Windows

Website: https://bestexteriors.com/
Address: 116 Springstowne Center, Vallejo, CA 94591
Phone: (707) 515-0257

Window Replacement Dublin

Dublin, CA
4.0
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Dependable Service
  • Pros icon Reliable Appointment Windows

Services Offered

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

Website: https://bestexteriors.com/
Address: 4530 Dublin Blvd, Dublin, CA 94568
Phone: (925) 587-4767

Window Replacement Livermore

Livermore, CA
4.0
★★★★★
  • Pros icon Free Quotes
  • Pros icon Dependable Service
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Architectural Glass
  • Service icon Fast Delivery
  • Service icon Custom Window Designs
  • Service icon Double-Hung
  • Service icon Sliding Glass
  • Service icon Bay & Bow Windows

Website: https://bestexteriors.com/
Address: 1374 Railroad Ave, Livermore, CA 94550
Phone: (925) 495-1522

Window Replacement Pleasanton

Pleasanton, CA
4.0
★★★★★
  • Pros icon No-fee Quotes
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Excellent Customer Service

Services Offered

  • Service icon Architectural Glass
  • Service icon Fast Delivery
  • Service icon Custom Windows
  • Service icon Double-Hung
  • Service icon Sliding Glass
  • Service icon Bay & Bow Windows

Website: https://bestexteriors.com/
Address: Pleasanton Ave, Pleasanton, CA 94566
Phone: (925) 400-8953

Window Replacement San Francisco

San Francisco, CA
4.0
★★★★★
  • Pros icon Free Quotes
  • Pros icon Timely Service
  • Pros icon No-Hassle Pricing
  • Pros icon Educational Website

Services Offered

  • Service icon Architectural Glass
  • Service icon Fast Delivery
  • Service icon Custom Window Designs
  • Service icon Double-Hung
  • Service icon Sliding Glass
  • Service icon Bay & Bow Windows

Website: https://bestexteriors.com/
Address: 1597 Sanchez St, San Francisco, CA 94131
Phone: (650) 402-1162

Window Replacement Oakland

Oakland, CA
4.0
★★★★★
  • Pros icon No-Hassle Pricing
  • Pros icon Dependable Service
  • Pros icon Good Customer Service
  • Pros icon Free Quotes

Services Offered

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

Website: https://bestexteriors.com/
Address: 1722 Broadway, Oakland, CA 94612
Phone: (510) 722-0008

Window Replacement Alameda

Alameda, CA
4.0
★★★★★
  • Pros icon Arrives on Time
  • Pros icon Good Customer Service
  • Pros icon Reliable Service
  • Pros icon No-fee Quotes

Services Offered

  • Service icon Architectural Glass
  • Service icon Fast Delivery
  • Service icon Custom Windows
  • Service icon Double-Hung
  • Service icon Sliding Glass
  • Service icon Bay & Bow Windows

Website: https://bestexteriors.com/
Address: 555 Ralph A Memorial Pkwy, Alameda, CA 94501
Phone: (510) 722-0010

Window Replacement Redwood City

Pleasanton, CA
4.0
★★★★★
  • Pros icon Free Quotes
  • Pros icon Helps Educate Customers
  • Pros icon Excellent Customer Service
  • Pros icon No-Hassle Pricing

Services Offered

  • Service icon Architectural Glass
  • Service icon Fast Delivery
  • Service icon Custom Windows
  • Service icon Double-Hung
  • Service icon Sliding Glass
  • Service icon Bay & Bow Windows

Website: https://bestexteriors.com/
Address: 649 Main St, Pleasanton, CA 94566
Phone: (650) 569-1968

Roxy Glass

Morton Ave, CA
4.0
★★★★★
  • Pros icon No-Hassle Pricing
  • Pros icon Excellent Customer Service
  • Pros icon Free Quotes
  • Pros icon Educational Website

Services Offered

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

Website: https://bayareawindowglass.com/
Address: 7401-A, Morton Ave, Newark, CA 94560
Phone: (510) 400-7788

Window Replacement Walnut Creek

Walnut Creek, CA
4.0
★★★★★
  • Pros icon Educational Website
  • Pros icon No-Hassle Pricing
  • Pros icon Excellent Customer Service
  • Pros icon Dependable Service

Services Offered

  • Service icon Architectural Glass
  • Service icon Fast Delivery
  • Service icon Custom Windows
  • Service icon Double-Hung
  • Service icon Sliding Glass
  • Service icon Bay & Bow Windows

Website: https://bestexteriors.com/
Address: 2842 Ygnacio Valley Rd, Walnut Creek, CA 94598
Phone: (925) 464-1334

Window Replacement Concord

Concord, CA
4.0
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Consistent Workmanship
  • Pros icon No-fee Quotes
  • Pros icon Reliable Appointment Windows

Services Offered

  • Service icon Architectural Glass
  • Service icon Fast Delivery
  • Service icon Custom Windows
  • Service icon Double-Hung
  • Service icon Sliding Glass
  • Service icon Bay & Bow Windows

Website: https://bestexteriors.com/
Address: 1856 Colfax St, Concord, CA 94520
Phone: (925) 466-4343

Window Replacement Union City

Union City, CA
4.0
★★★★★
  • Pros icon Reliable Appointment Windows
  • Pros icon Helps Educate Customers
  • Pros icon Good Customer Service
  • Pros icon Consistent Workmanship

Services Offered

  • Service icon Architectural Glass
  • Service icon Fast Delivery
  • Service icon Custom Windows
  • Service icon Double-Hung
  • Service icon Sliding Glass
  • Service icon Bay Windows

Website: https://bestexteriors.com/
Address: 4126 Dyer St, Union City, CA 94587
Phone: (510) 722-0020

Window Replacement San Mateo

San Mateo, CA
4.0
★★★★★
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Reliable Service
  • Pros icon Reliable Appointment Windows

Services Offered

  • Service icon Architectural Glass
  • Service icon Fast Delivery
  • Service icon Custom Windows
  • Service icon Double-Hung
  • Service icon Sliding Glass
  • Service icon Bay & Bow Windows

Website: https://bestexteriors.com/
Address: 514 S Norfolk St, San Mateo, CA 94401
Phone: (650) 356-8663

Best Exteriors

Oakland, CA
4.0
★★★★★
  • Pros icon Dependable Service
  • Pros icon No-fee Quotes
  • Pros icon Excellent Customer Service
  • Pros icon No-Hassle Pricing

Services Offered

  • Service icon Architectural Glass
  • Service icon Fast Delivery
  • Service icon Custom Windows
  • Service icon Double-Hung
  • Service icon Sliding Glass
  • Service icon Bay Windows

Website: https://bestexteriors.com/
Address: 1301 E 31st St, Oakland, CA 94602
Phone: (510) 961-3175

How Installing Energy-Efficient Windows in Vine Hill Saves You Money

Switching to energy-efficient windows can help improve the comfort of your home and help you save on energy bills. Here's more information on how upgrading your windows could benefit you:

  • Protect your valuables: Many Energy Star certified windows have low-emissivity coatings, which not only provide better insulation for your home, but also filter out harmful UV rays, preventing your furniture, carpet and other valuables from fading.
  • Save on electricity bills: After you install energy-efficient windows, you can expect a reduction in your bills by about 12% because you'll need less energy to heat or cool your home.
  • Reduce your carbon footprint: Reducing the amount of energy you use also lowers your carbon emissions. You could reduce it by about 117 pounds.
  • Protect your investment: The older your home is, the more likely it is that getting new windows will benefit you. Older homes tend to have windows that are outdated, leaky or maybe even damaged in some way. Upgrading your windows could help increase the value of your home if you decide to sell.

Estimated Cost of Window Replacement in Vine Hill

Windows come in varying shapes and sizes, so costs and services will vary greatly. Here are the average costs and the primary services that you'll find from the average window installation company.

How Much Do New Windows Cost?

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

Bear in mind that energy-efficient windows may cost more, but Energy Star estimates the upgrade will save you between $101 and $583 per year when you install single-pane windows and between $27 and $197 per year when you install double-pane, clear glass windows. Your savings will vary based on your local climate, energy rates and individual home characteristics.

We recommend requesting free quotes from multiple window installers to find the right windows and the company that works best for your budget.

What Services do Window Installers Offer?

Generally, there are two kinds of window installation services you can get: full-frame and pocket installations.

Full-frame installations require replacing the full window — the sill, frame, trim and all. These are typically done when you want a new style for your windows or when it has a great amount of damage. Full-frame installations are more involved and will increase overall costs. Pocket installations (or retrofits) entail installing a new window within the existing frame, which makes pocket installations more simple and affordable. However, if the frame has any rot or deterioration, you should opt for a full-frame installation instead.

Your window installer should be able to help you choose which type of installation you should get.

Excellent Reputation

Milgard Windows & Doors

★★★★★
4.5

  • EnergyStar Partner
  • Wide network of installers
  • Lifetime warranty available
  • Limited additional services

Best Overall

Renewal by Andersen

★★★★★
4.5

  • Award-winning company
  • Great industry reputation
  • Manufactures products in-house
  • No lifetime warranty

Best Affordability

Window World

★★★★★
4.5

  • Lifetime warranty
  • EnergyStar Partner
  • Low prices relative to competitors
  • Quality of service will depend on your area

How We Choose the Best Window Installers in Vine Hill

EcoWatch reviews differ from other reviews because we look at these companies through a sustainability lens. We have reviewed the best window installation companies in Vine Hill mostly 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 reduce your energy bills by hundreds of dollars. Along with energy efficiency, our rating methodology takes the following factors into consideration:

Service Area

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

Work Quality

We're willing to bet that you're looking for a company to do a great job installing windows. We've vetted each company on this list to ensure its technicians are well-qualified and that the company has received tons of positive customer feedback to vouch for its service.

Customer Reviews

We analyzed trends in recent online reviews to determine the companies with the most consistent customer satisfaction. Customer satisfaction may be the factor we place the most value on, as it reflects the quality of services across nearly every category, including quality of installation, cost, professionalism, warranty, quality of parts and more.

Cost

This one is a give-and-take: similar to other services, cheap window companies are not going to provide the most quality service. On the other hand, we want to make sure we're highlighting companies that provide a variety of price and financing options so they're accessible to most homeowners.

Warranty

As discussed, windows are a serious investment, so you'll want to be certain that investment is protected. Window installation companies with lengthy warranties for products, parts and installation (aka workmanship) 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 installation companies that have more years of experience earn higher rankings by our standards. We like to see at least ten years of experience.

Vine Hill, CA Window Replacement FAQs

How much does a window install cost?

The national average cost of installing one window is around $600 but can range from $200 to $1,200, depending on a few different factors. The price is often influenced by the location of your property, the type and material of the window and the size of the window. Also, remember that energy-efficient windows may cost more upfront but can save you a decent amount of money a year in energy bills.

What are the most common kinds of replacement windows?

The most common kinds of windows for homes include: bay windows, slider windows, picture windows, awning windows, transom windows, double-hung and single-hung windows and casement windows.

What services do window replacement companies provide?

Window installers travel to your house to remove your old windows and replace them with new ones. Some providers install products made by other companies, whereas others are both manufacturers and installation companies combined. The installer will also clean up after the installation.

When is it time to replace your windows?

Windows have an average 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 any damage on them, or they have become difficult to operate, they may be in need of replacement.

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