20 Best Window Companies in Pistakee Highlands, IL (2023 Reviews)

Looking to improve your home's appearance? The top window replacement companies can help.

We analyzed all the top-rated window companies in Pistakee Highlands 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 September 15, 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 review of the top window installation companies in Pistakee Highlands may not seem like the most compelling article on EcoWatch, but trust us, windows impact your life more than you might realize. According to the Department of Energy, heat or cool air lost through outdated, drafty windows could represent 25-30% of residential energy climate control costs.

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

So if you're constructing a new home, renovating or replacing your windows in Pistakee Highlands, this guide is 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 Pistakee Highlands

The EcoWatch team evaluated dozens of installers that service the Pistakee Highlands area to find the best window installation companies that fit our standards. The providers in this article scored best in our categories: energy-efficient offerings, price, availability, customer service 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 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 Pistakee Highlands. It's the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has been in the window installation business for around 27 years. Its reputation is backed by hundreds of positive reviews from customers online.

Window World may be the company for you if you want one 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

Window World has some Energy Star windows, but note that not all its windows are energy-efficient, so make sure you ask for 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 Pistakee Highlands?

Window World does not display prices on its website, but it's known for offering some of the most affordable window installations around. The best way to get more accurate pricing information is to get a free quote from the company.

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 Pistakee Highlands. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has about 27 years of experience in the window installation industry.

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, Andersen may be the perfect 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 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 Pistakee Highlands?

Prices are not available on Andersen’s website since 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. If you’d like more accurate information, you can inquire about a quote on the company’s website.

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. Universal has over 20 years of industry experience, and it currently serves 27 states nationwide. Its reputation is backed by many positive reviews on customer review websites.

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

Energy Efficiency of Universal Windows Direct Windows

Universal Windows Direct has some Energy Star windows, but note that not all its windows are energy-efficient, so be sure to ask for Energy Star windows when inquiring. The company 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 Pistakee Highlands?

Although prices are not readily available on Universal’s website, 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. The best way to know for sure is to ask for a free 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 Pistakee Highlands. It's a company that serves hundreds of thousands of homeowners, mostly in the mid-Atlantic region of the U.S. Window Nation has been in the window installation business for around 16 years. Its reputation is backed by hundreds of positive reviews from customers online.

Window Nation may be the company for you if you want one 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

Window Nation has some Energy Star windows, but note that not all its windows are energy-efficient, so make sure you ask for 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 Pistakee Highlands?

Window Nation does not display prices on its website, but based on customer feedback, you can expect to pay between $300 and $525 per window installed, making it a more affordable option compared to competitors. The best way to get more accurate pricing information is to get a free quote from the company.

We aim to stay unbiased and transparent by mentioning pros and cons for each installer. Additionally, any partnerships do not influence our reviews.

More Window Companies in Pistakee Highlands

Renewal by Andersen of Chicago

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

Services Offered

  • Service icon Commercial Windows
  • Service icon Stained Glass
  • Service icon Double-Hung
  • Service icon Custom Window Designs
  • Service icon Sliding Glass
  • Service icon Window Replacement
  • Service icon Glass Showers
  • Service icon Full-Service Installations
  • Service icon Residential Windows
  • Service icon Bay Windows

Website: https://www.renewalbyandersen.com/window-company/080-chicago-il/about-us
Address: 2300 Ridge Dr, Glenview, IL 60025
Phone: (847) 486-5680

Window World Western Chicago

Lisle, IL
4.3
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

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

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

Champion Replacement Windows of Milwaukee

New Berlin, WI
4.1
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

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

Website: https://www.championwindow.com/Milwaukee/
Address: 16560 W Glendale Dr, New Berlin, WI 53151
Phone: (414) 208-4056

Window Nation

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

Services Offered

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

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

Renowned Building Solutions

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

Services Offered

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

Website: https://www.renownedbuildingsolutions.com/
Address: 1819 N Dot St, McHenry, IL 60050
Phone: (844) 736-6961

Hetman Enterprises, Inc

Gurnee, IL
3.9
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Window Replacement
  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Fast Delivery

Website: http://hetmanexteriors.com/
Address: 1499 Greystone Dr, Gurnee, IL 60031
Phone: (847) 932-9151

Home Services at The Home Depot

IL-83, IL
3.5
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Glass Showers
  • Service icon Commercial Windows
  • Service icon Stained Glass
  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Window Replacement
  • Service icon Fast Delivery

Website: https://www.homedepot.com/l/Round-Lake-Beach/IL/Round-Lake-Beach/60073/8431/services
Address: 2050 N, IL-83, Round Lake Beach, IL 60073
Phone: (847) 773-0708

HX Home Solutions

Libertyville, IL
4.3
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Glass Showers
  • Service icon Energy-Efficient Options
  • Service icon Window Replacement
  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Full-Service Installations
  • Service icon Commercial Windows

Website: https://www.hxhome.solutions/
Address: 1840 Industrial Dr Ste 100, Libertyville, IL 60048
Phone: (224) 487-8409

Your Window Solutions

Lake in the Hills, IL
4.3
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

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

Website: https://4yourwindowsolutions.com/
Address: 8411 Pyott Rd #111, Lake in the Hills, IL 60156
Phone: (833) 367-9687

Goverla Windows and Doors

Fox River Grove, IL
4.3
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

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

Website: https://www.goverlausa.com/
Address: 601 Hunters Way, Fox River Grove, IL 60021
Phone: (847) 630-6444

Waukegan Gurnee Glass

Gurnee, IL
4.4
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Double-Hung
  • Service icon Window Replacement
  • Service icon Glass Showers
  • Service icon Commercial Windows
  • Service icon Sliding Glass
  • Service icon Custom Window Designs
  • Service icon Aluminum Window Frames
  • Service icon Full-Service Installations
  • Service icon Residential Windows
  • Service icon Fast Delivery
  • Service icon Tempered Glass

Website: http://www.wgglass.com/
Address: 1200 Estes Ave, Gurnee, IL 60031
Phone: (847) 623-4141

The Glass Guru

Waukegan, IL
4.6
★★★★★
  • Pros icon Educational Website
  • Pros icon Timely Service
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment

Services Offered

  • Service icon Double-Hung
  • Service icon Aluminum Window Frames
  • Service icon Fast Delivery
  • Service icon Custom Window Designs
  • Service icon Stained Glass
  • Service icon Window Replacement
  • Service icon Residential Windows
  • Service icon Window Repair
  • Service icon Tempered Glass
  • Service icon Glass Showers
  • Service icon Sliding Glass
  • Service icon Commercial Windows
  • Service icon Full-Service Installations

Website: https://theglassguru.com/locations/gurnee-il/
Address: 1020 S Northpoint Blvd Ste F, Waukegan, IL 60085
Phone: (847) 750-3363

Next Level Windows Inc.

Gurnee, IL
4.3
★★★★★
  • Pros icon Timely Service
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

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

Website: https://nextlevelwindows.com/
Address: 3575 Grand Ave 2nd floor Suite F, Gurnee, IL 60031
Phone: (224) 678-8645

Friendly Windows | Window Replacement

Suite #200F, IL
4.2
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

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

Website: https://www.friendly-windows.com/
Address: 135 Park Avenue, Suite #200F, Barrington, IL 60010
Phone: (773) 550-9000

HP Millwork

Lake Forest, IL
4.0
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Commercial Windows
  • Service icon Custom Window Designs
  • Service icon Window Replacement
  • Service icon Fast Delivery
  • Service icon Aluminum Window Frames
  • Service icon Residential Windows

Website: https://www.hpmillwork.com/
Address: 28457 Ballard Dr Unit C2, Lake Forest, IL 60045
Phone: (847) 780-3875

HP Windows And Doors

Barrington, IL
3.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

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

Website: https://www.hpwindowsanddoors.com/
Address: 148 W Station St, Barrington, IL 60010
Phone: (847) 748-2544

ELEVATE Windows and Doors Replacement

Lake Bluff, IL
4.2
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Double-Hung
  • Service icon Commercial Windows
  • Service icon Energy-Efficient Options
  • Service icon Window Replacement

Website: http://www.elevatewindowsglenview.com/
Address: 21 N Skokie Hwy Suite 107B, Lake Bluff, IL 60044
Phone: (847) 563-4321

NWED Window Replacement

Lake Zurich, IL
3.7
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Residential Windows
  • Service icon Window Replacement
  • Service icon Window Repair

Website: https://windowslakezurich.com/
Address: 126 E Harbor Dr, Lake Zurich, IL 60047
Phone: (224) 662-3530

RemodelGo Windows & Doors

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

Services Offered

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

Website: https://www.remodelgo.com/
Address: 247 N Eric Dr, Palatine, IL 60067
Phone: (847) 922-2134

Morningside Exteriors

Barrington, IL
3.6
★★★★★
  • Pros icon Timely Service
  • Pros icon Educational Website

Services Offered

  • Service icon Residential Windows
  • Service icon Window Replacement
  • Service icon Aluminum Window Frames

Website: https://morningsideexteriors.com/
Address: 228 W Main St, Barrington, IL 60010
Phone: (847) 750-4294
Pistakee Highlands Window Cost Calculator

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

By upgrading to energy-efficient windows, you can take advantage of several benefits, such as:

  • Save on power bills: Since energy-efficient windows reduce how much energy you need to heat or cool your home, the switch can help you save around $317 annually on your energy bills in Pistakee Highlands.
  • Better temperature control in your home: Energy-efficient windows can decrease how hard your heating system needs to work to heat 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 potentially even damaged in some way. Updating your windows could help increase the value of your home if you decide to sell.
  • Protect your valuables: The low-emissivity coatings on many energy-efficient windows help prevent your floors, carpets and furniture from fading by filtering out UV rays.

Estimated Cost of Window Replacement in Pistakee Highlands

Windows come in various shapes and sizes, so costs and services will differ considerably. Here are the typical costs and the primary services that you can find from window installers.

How Much Do New Windows Cost?

The national average cost to replace one window is about $600 but can range anywhere from $200 to $1,200. How much it will cost you is based on several factors, such as number of windows, the location of your home, type, material, size and more.

It's also worth keeping in mind that energy-efficient windows will almost always cost more initially, but Energy Star estimates that upgrading the windows on your Pistakee Highlands home can mean an average energy savings of $236 to $319 a year for single-pane window replacement, or between $87 to $126 a year for double-pane windows. The amount of money you'll save by switching to energy-efficient windows depends on your local climate, energy rates and other factors unique to your home.

The cost of your window installation will also vary based on the kind of window material you choose for the frames. Wood windows are usually the most expensive, though it depends if they are 100% wood or clad with aluminum or vinyl. Fiberglass windows also tend to be somewhat more expensive than vinyl, but they are shown to be more efficient.

What Services do Window Installers Offer?

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

Full-frame installations entail replacing the full window, including the frame, sill and trim. You most likely need a full-frame installation when you want a new style or your window has noticeable deterioration. Full-frame installations are more involved and will raise overall costs. A pocket installation involves replacing a window within the existing frame, which is usually less expensive than a full-frame installation.

Your window installation company will be able to recommend the best type for your project. In Pistakee Highlands, the decision will mostly be based on the efficiency of your home and the age and condition of your existing frames.

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 Pistakee Highlands

In our hunt to make your home improvements easier and more eco-friendly in Pistakee Highlands, EcoWatch evaluated many companies before deciding on these. We have evaluated the top window replacement companies in Pistakee Highlands mostly based on energy efficiency, as it's the most sustainable option and the best one for homeowners. Energy Star certified windows can reduce your power bills by hundreds of dollars. Along with energy efficiency, our rating methodology takes the following factors into consideration:

Service Area

This one is self-explanatory, but we've chosen to highlight window installers that serve Pistakee Highlands so you can find a quality window installation company near you.

Work Quality

We're certain that you're looking for professionals who do a great job installing windows. We've vetted each installer featured in our guide 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

Customer feedback is another very important review factor. If most customers don't have positive feedback about their service from a certain window installation company, it won't be featured on EcoWatch.

Cost

Cheaper windows certainly don't mean better windows, but we know many of our readers try to keep costs as low as possible. When analyzing providers' prices, 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. For that reason, window installation companies that offer lengthy warranties for products, parts and labor rank higher with EcoWatch.

Years of Experience

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

Pistakee Highlands, IL Window Replacement FAQs

How much should window installation cost?

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

What are the different types of windows?

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

Can I install my own windows?

Even though you can install your own windows, doing so requires a lot of time and experience with home improvement projects. Using a window replacement company can help ensure that the installation is done properly and that you won't have to spend the time and effort to do it yourself.

Should I replace my windows all at once?

If your windows are more than 20 years old, you most likely need to replace all of them. At that point, they are often less efficient, draftier and/or more damaged than new windows. Replacing your windows all at once will involve less paperwork and less stress.

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