21 Best Window Replacement Companies in Muttontown, NY (2023 Reviews)
Window Companies Near Me

When the time comes to replace your windows, our reviews of the top window installation companies can help you find the right provider for you.

We analyzed all the top window installers in Muttontown 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 May 04, 2023

Why you can trust EcoWatch

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

A guide on the top window installation companies in Muttontown may not seem like the most captivating article on the EcoWatch site, but trust us, windows impact your life more than you might think. When it's the middle of winter, your old and leaky windows could be making your home harder to heat and costing you more in power bills.

That's also bad news for the environment, as the additional energy required by leaky windows increases your carbon footprint.

Unlike other sites, EcoWatch ranks window replacement companies on energy efficiency while also considering cost, customer satisfaction and service area.

Best Affordability

Window World

★★★★★
4.5

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

Best Overall

Renewal by Andersen

★★★★★
4.5

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

Best Warranty

Universal Windows Direct

★★★★★
4

  • Manufactures products in-house
  • Wide variety of products and services
  • Makes charitable contributions
  • Quality of service will depend on your area

Best Window Replacement Companies in Muttontown

The EcoWatch team evaluated several installers in Muttontown to find the best ones for our readers. The installers we've included in this article scored best in our categories: energy-efficient offerings, price, customer service, availability and more.

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

Window World

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

Window World provides windows expertise in Muttontown. It's the largest window replacement company in the country, known for its vinyl windows and affordability. This window installation company has been in business since 1995 and currently serves 200 locations nationwide. The company has many positive reviews from customers online.

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 right company for you.

Energy Efficiency of Window World Windows

There are a wide range 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 Muttontown?

Prices aren't mentioned on Window World's website, but it's known for offering some of the most affordable window installations around. If you'd like more accurate information, you can ask for a quote on the company's website.

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. This provider has 27 years of experience in the window installation industry, and it has proved to be one of the best companies in the business.

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 variety of window types available from Renewal by Andersen, 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 Muttontown?

Andersen doesn't have any prices 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 inquire about a free quote on its website for more information about the cost.

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 Manufactures products in-house
  • Pros icon Wide variety of products and services
  • Pros icon Makes charitable contributions
Cons:
  • 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. Universal has been in the window installation business for about 20 years. Its reputation is backed by all the positive reviews on customer review websites.

Universal may be the company for you if you're interested in one that has an industry-leading warranty covering products, parts and workmanship for life.

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 ask for 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 Muttontown?

Universal does not mention prices 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 request a free quote on its website for more information about the cost.

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

More Window Replacement Companies in Muttontown

Window World of Long Island

Farmingdale, NY
4.2
★★★★★
  • 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 Commercial Windows
  • Service icon Bay Windows
  • Service icon Fast Delivery
  • Service icon Glass Showers
  • Service icon Residential Windows
  • Service icon Double-Hung
  • Service icon Sliding Glass
  • Service icon Stained Glass
  • Service icon Custom Window Designs
  • Service icon Tempered Glass

Website: http://www.windowworldlongisland.com/
Address: 33 Hempstead Tpke, Farmingdale, NY 11735
Phone: (516) 377-3500

The Shade Store

Greenwich, CT
4.1
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Timely Service
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Stained Glass
  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Double-Hung
  • Service icon Energy-Efficient Options
  • Service icon Aluminum Window Frames
  • Service icon Glass Showers
  • Service icon Commercial Windows
  • Service icon Fast Delivery

Website: https://www.theshadestore.com/showrooms/connecticut/greenwich
Address: 48 West Putnam Avenue, Greenwich, CT 06830
Phone: (203) 987-3080

Tri State Window Factory

Deer Park, NY
4.1
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Timely Service
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Award-Winning

Services Offered

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

Website: http://www.tristatewindowfactory.com/
Address: 360 Marcus Blvd, Deer Park, NY 11729
Phone: (631) 667-8600

BluRock Services, inc.

Queens, NY
4.1
★★★★★
  • Pros icon Free assessment
  • Pros icon Timely Service
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Award-Winning

Services Offered

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

Website: https://blurockservices.com/
Address: 43-02 209th St, Queens, NY 11361
Phone: (516) 368-4533

Good Guys Contracting

West Babylon, NY
4.1
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Double-Hung
  • Service icon Full-Service Installations
  • Service icon Bay Windows
  • Service icon Residential Windows
  • Service icon Commercial Windows
  • Service icon Energy-Efficient Options
  • Service icon Aluminum Window Frames
  • Service icon Custom Window Designs
  • Service icon Stained Glass

Website: http://www.goodguyscontracting.com/
Address: 441 Broadway, West Babylon, NY 11704
Phone: (631) 559-6420

Sky Windows and Doors

Freeport, NY
4.0
★★★★★
  • Pros icon Timely Service
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

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

Website: http://www.skywindowsnj.com/
Address: 145 N Main St, Freeport, NY 11520
Phone: (516) 686-8485

Alure Home Improvements

East Meadow, NY
4.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Award-Winning

Services Offered

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

Website: https://www.alure.com/
Address: 1999 Hempstead Tpke, East Meadow, NY 11554
Phone: (516) 296-7777

Tri State Window Factory

Seaford, NY
4.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Timely Service
  • Pros icon Price Transparency
  • Pros icon Award-Winning
  • Pros icon Educational Website

Services Offered

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

Website: http://www.tristatewindowfactory.com/
Address: 3657 Merrick Rd, Seaford, NY 11783
Phone: (800) 645-4568

Pella Windows & Doors of Roslyn Heights

Roslyn Heights, NY
4.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Award-Winning
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

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

Website: https://www.pellabranch.com/long-island/showrooms/roslyn-heights/
Address: 79 Powerhouse Rd, Roslyn Heights, NY 11577
Phone: (516) 938-7655

Sears Window Replacement

New Rochelle, NY
4.0
★★★★★
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Award-Winning

Services Offered

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

Website: https://www.searshomeservices.com/locations/hi/window-replacement/ny/newrochelle
Address: 5 Plain Ave, New Rochelle, NY 10801
Phone: (914) 243-1427

Mr. Handyman of Huntington and Smithtown

East Northport, NY
3.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Award-Winning
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Timely Service

Services Offered

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

Website: https://www.mrhandyman.com/huntington-smithtown/
Address: 514 Larkfield Rd Suite 8, East Northport, NY 11731
Phone: (631) 257-3213

Window Therapy

East Rockaway, NY
3.9
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

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

Website: http://www.windowtherapy.com/
Address: 147 Main St, East Rockaway, NY 11518
Phone: (516) 400-9226

TriView Reflections

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

Services Offered

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

Website: https://www.triviewshowerdoor.com/
Address: 657 Old Country Rd, Westbury, NY 11590
Phone: (516) 338-4170

Home Services at The Home Depot

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

Services Offered

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

Website: https://www.homedepot.com/l/Commack/NY/Commack/11725/1202/services
Address: 5025 Jericho Turnpike, Commack, NY 11725
Phone: (631) 237-5030

Sears Window Replacement

East Northport, NY
3.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Award-Winning
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

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

Website: https://www.searshomeservices.com/locations/hi/window-replacement/ny/east-northport
Address: 4000 Jericho Turnpike, East Northport, NY 11731
Phone: (631) 606-2190

Home Services at The Home Depot

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

Services Offered

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

Website: https://www.homedepot.com/l/Elmont/NY/Elmont/11003/1208/services
Address: 600 Hempstead Turnpike, Elmont, NY 11003
Phone: (516) 231-8723

Morningstar Doors and Windows, Inc.

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

Services Offered

  • Service icon Sliding Glass
  • Service icon Custom Window Designs
  • Service icon Stained Glass
  • Service icon Residential Windows
  • Service icon Aluminum Window Frames
  • Service icon Fast Delivery

Website: http://www.morningstardoorsandwindows.com/
Address: 215 Adams Blvd, Farmingdale, NY 11735
Phone: (631) 465-9960

Egress Pros

West Babylon, NY
3.9
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Award-Winning

Services Offered

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

Website: https://www.egresspros.com/
Address: 21A Edison Ave, West Babylon, NY 11704
Phone: (516) 224-7576

Mikita Door & Window

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

Services Offered

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

Website: https://mikitadoorandwindow.com/
Address: 136 W Sunrise Hwy, Freeport, NY 11520
Phone: (516) 867-4100

Pinnacle Glass

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

Services Offered

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

Website: https://www.pinnacleglassny.com/
Address: 84 Pine Aire Dr, Bay Shore, NY 11706
Phone: (800) 859-4616

Home Services at The Home Depot

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

Services Offered

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

Website: https://www.homedepot.com/l/Valley-Stream/NY/Valley-Stream/11581/1216/services
Address: 101 Green Acres Rd S, Valley Stream, NY 11581
Phone: (516) 231-9029

How Installing Energy-Efficient Windows in Muttontown Saves You Money

By upgrading to energy-efficient windows, you and your family can enjoy several benefits, including:

  • Protect your valuables: The low-emissivity coatings on many energy-efficient windows help reduce damage from the sun's UV rays to your floors, carpets and furniture.
  • Save on power bills: After you upgrade to energy-efficient windows, you can see a reduction in your bills by about 12% because you'll use less energy to heat or cool your home.
  • 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, drafty or maybe even damaged in some way. Upgrading your windows could help raise the value of your property if you decide to sell.
  • Reduce your carbon footprint: Reducing how much energy you use also lowers your indirect greenhouse gas emissions. You could reduce it by 307 pounds per year on average.

Estimated Cost of Window Replacement in Muttontown

Each window replacement company provides various services and has varying costs depending on a few factors.

How Much Do New Windows Cost?

According to our research, the average cost of installing a single window is about $600. However, window replacement costs can range from $200 to $1,200 per window. This is because the cost of window installations are based on a variety of factors specific to your home, such as the size, material and number of windows you need to replace, as well as the location of your property.

With windows, efficiency is one of the most important factors for most homeowners. Efficient windows may cost more initially, but by increasing the efficiency of your home — especially during the summer and winter — they can provide decades of energy savings. According to Energy Star, purchasing certified energy-efficient windows can save Muttontown homeowners $283+ per year after replacing single-pane windows.

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

What Services do Window Installers Offer?

There are typically two types of window replacement services: full-frame and pocket installations.

A full-frame installation is a total window replacement. This service involves removing the old window, the windowsill, and the exterior and interior trim. It also involves additional materials, such as insulation and drip edges, which raise the total cost of the project. It's also worth noting that 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 will be less expensive, but you can't do this type of installment if you have any pre-existing rot or water damage.

If you're still debating which type of installation you need, you can talk to your installer and get their advice. The choice mostly is influenced by how old the frames are and if there's any damage.

Best Affordability

Window World

★★★★★
4.5

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

Best Overall

Renewal by Andersen

★★★★★
4.5

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

Best Warranty

Universal Windows Direct

★★★★★
4

  • Manufactures products in-house
  • Wide variety of products and services
  • Makes charitable contributions
  • Quality of service will depend on your area

How We Choose the Best Window Installers in Muttontown

In our search to make your home improvements easier and more eco-friendly in Muttontown, the EcoWatch Reviews team chose the above companies as the top window installation companies in the city. We have evaluated the top window replacement companies in Muttontown mostly based on energy efficiency, as the most sustainable option also benefits homeowners in many ways. Energy-efficient windows can reduce your power bills by hundreds of dollars. Along with energy efficiency, our rating methodology is based on the following factors:

Service Area

Because this is a guide for Muttontown, we only included companies that provide services to the city. There are other reputable providers that didn't make the cut because they wouldn't be able to serve homeowners in Muttontown.

Work Quality

When it comes to new windows, the quality and breadth of services can often play just as important of a role in insulation and performance as the type of window you opt for. We do give window installers more points if they offer high-quality products, but we also consider workmanship as reflected in customer feedback.

Customer Reviews

Customer feedback is another super important review factor. If the majority of customers don't have good things to say about their service from a certain installer, you won't see it featured on EcoWatch.

Cost

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

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 installation (aka workmanship) rank higher with EcoWatch.

Years of Experience

Lastly, we like to see companies that have been in the industry for a while. Window installation companies that have more years of experience are going to earn higher rankings by our standards. We like to see at least ten years of experience.

Muttontown, NY Window Replacement FAQs

How much should window installation cost?

The national average cost of replacing a single window is about $600 but can range from $200 to $1,200, depending on a variety of factors. The price is often influenced by the location of your property, the size of the window and the type and material of the window. Also, remember that energy-efficient windows may cost more initially but can save you hundreds of dollars a year in energy bills.

What are the most common types of replacement windows?

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

When do I have to use a window installation company?

Unless you're handy and have the time to replace your own windows, we recommend hiring a professional installer. The window installation process is complicated and can take anywhere from four to six hours for a single window. Although it's tempting to try to do it yourself to save money, hiring a professional is a faster, more efficient and much safer alternative.

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

Replacement windows can be installed at any time, but warmer weather is typically better. No matter when you install them, the contractors will take steps to make sure that too much hot or cold air doesn't get into the house, so the temperature outside isn't necessarily a big factor. Most importantly, the weather should be dry.

How often should you replace your windows?

Windows usually last about 20 to 30 years, but anytime you notice damage on your windows, it's a good time to have an expert take a look at them to see if they are in need of a repair or replacement.

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