27 Best Window Replacement Companies in Flagg, IL (2023 Reviews)
Window Companies Near Me

Are you thinking of upgrading your windows? Our guide to the best window installation companies can help you narrow down which one to choose.

We analyzed all the top window installers in Flagg and selected the top 27 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.

Whether you're updating for aesthetics or have damaged windows, windows play a crucial role in conserving energy in your home. If your house has outdated, drafty windows, your AC or heater could be working overtime to heat or cool your house. This means higher power bills.

Installing upgraded, efficient windows on your house can help you save money every month on your electricity bills — and you can help the environment as well.

Efficient windows are of particular importance in Flagg, where the temperature varies throughout the year. According to Energy Star, making the switch to energy-efficient windows can save the average homeowner up to $309 a year.

Best Overall

Renewal by Andersen

★★★★★
4.5

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

Best Affordability

Window World

★★★★★
4.5

  • Lifetime warranty
  • EnergyStar Partner
  • Great industry reputation
  • Quality of service will depend on your area

Best Warranty

Universal Windows Direct

★★★★★
4

  • Lifetime warranty
  • Makes charitable contributions
  • Wide variety of products and services
  • Quality of service will depend on your area

Best Window Replacement Companies in Flagg

The EcoWatch Reviews team evaluated dozens of installers in Flagg to find the top window companies for our readers. The companies we've included in this article scored best in our categories: energy-efficient offerings, customer service, price, availability and more.

Renewal by Andersen logo
FAST QUOTE
as little as 30 seconds
Best Overall

Renewal by Andersen

★★★★★
BBB Rating: A
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon Manufactures products in-house
  • Pros icon Great industry reputation
  • Pros icon Award-winning company
Cons:
  • Pros icon No lifetime warranty

Renewal by Andersen has the best availability in Flagg. This provider has 27 years of experience in the window installation business, and it has proved to be one of the most reputable companies in Flagg.

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

Energy Efficiency of Renewal by Andersen Windows

Renewal by Andersen carries 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 Flagg?

Andersen does not detail prices 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. Getting 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 Great industry reputation
Cons:
  • Pros icon Quality of service will depend on your area

Window World provides windows expertise in Flagg. It's the largest window replacement company in the country, known for its vinyl windows and affordability. This window installation company has been operating since 1995 and currently serves 200 locations nationwide. The provider has plenty of positive reviews from customers on online review websites.

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

Window World has some Energy Star windows, but note that not all its windows are energy-efficient, so make sure you mention that you want 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 Flagg?

Prices aren't listed on Window World's website, but it's known for offering some of the most affordable window installations around. You can request 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 Lifetime warranty
  • Pros icon Makes charitable contributions
  • Pros icon Wide variety of products and services
Cons:
  • Pros icon Quality of service will depend on your area

Universal Windows Direct provides the best warranty in Flagg. It's a company that has grown immensely since its inception in 2002, and now has several franchise dealers nationwide. Universal has been in the window industry for about 20 years. Hundreds of positive reviews on customer review websites back the company's reputation.

You may want to consider going with Universal if you're looking for a company 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 make sure you 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 Flagg?

Prices aren't available on Universal's 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 get more accurate pricing information.

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 has the best residential windows in Flagg. 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 industry for around 16 years. Hundreds of positive reviews on customer review websites back the provider's reputation.

It gives customers the opportunity to view products and to speak to a representative in person in its showrooms.

Energy Efficiency of Window Nation Windows

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. Not all of Window Nation's offerings are Energy Star certified, so be sure to mention that you're interested in Energy Star windows when inquiring.

How much does Window Nation cost in Flagg?

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. If you'd like to know for sure, you can ask for a quote on the company's website.

We've recommended providers with shining reputations, but bear in mind that these are national companies, so your service may differ depending on your local crew. We have tried to stay unbiased and transparent by describing pros and cons for every company reviewed.

More Window Replacement Companies in Flagg

Window World of Rockford

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

Services Offered

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

Website: https://www.windowworldrockford.com/
Address: 6010 Forest Hills Rd, Loves Park, IL 61111
Phone: (815) 395-1333

Windows, Doors and Siding by Opal Enterprises Naperville

Naperville, IL
4.0
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Award-Winning
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

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

Website: https://www.opalexteriors.com/service-areas/naperville/
Address: 127 Ambassador Dr #159, Naperville, IL 60540
Phone: (630) 538-7568

Schmidt Exteriors, Inc.

Aurora, IL
3.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Award-Winning
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Energy-Efficient Options
  • Service icon Bay Windows
  • Service icon Custom Window Designs
  • Service icon Stained Glass
  • Service icon Residential Windows
  • Service icon Commercial Windows

Website: http://www.schmidtexteriors.com/
Address: 1585 Beverly Ct # 116, Aurora, IL 60502
Phone: (630) 406-0444

Mr. Handyman of Naperville

Geneva, IL
3.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Award-Winning
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Timely Service

Services Offered

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

Website: http://www.mrhandyman.com/naperville/
Address: 1871 S Randall Rd STE C, Geneva, IL 60134
Phone: (630) 280-3455

XL Contracting

Roscoe, IL
3.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Award-Winning
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

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

Website: http://xl-contracting.com/
Address: 11415 Main St, Roscoe, IL 61073
Phone: (844) 507-6551

Casco Industries

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

Services Offered

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

Website: http://www.cascoonline.com/
Address: 540 Division St, South Elgin, IL 60177
Phone: (847) 741-9595

Window Concepts

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

Services Offered

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

Website: http://www.window-concepts.com/
Address: 33 W Higgins Rd #905, South Barrington, IL 60010
Phone: (847) 513-9915

Meklee Interiors

St. Charles, IL
3.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

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

Website: https://www.mekleeinteriors.com/
Address: 50 Horne St, St. Charles, IL 60174
Phone: (630) 584-1545

WarmDreams Windows & Doors

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

Services Offered

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

Website: https://warmdreams.us/
Address: 206 Christina Dr, East Dundee, IL 60118
Phone: (312) 414-9298

A & G Glass & Mirror Inc

West Chicago, IL
3.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Timely Service

Services Offered

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

Website: http://www.agglass78.com/
Address: 501 W Roosevelt Rd, West Chicago, IL 60185
Phone: (630) 473-4132

Pella Windows & Doors of Rockford

Rockford, IL
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

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

Website: https://www.pellabranch.com/chicago/showrooms/rockford/
Address: 4301 11th St, Rockford, IL 61109
Phone: (815) 397-6780

Naperville Windows and Doors

Naperville, IL
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Sliding Glass
  • Service icon Custom Window Designs
  • Service icon Full-Service Installations
  • Service icon Residential Windows
  • Service icon Fast Delivery
  • Service icon Commercial Windows

Website: https://napervillewindowsanddoors.com/
Address: 1355 Illinois Rte 59 #1D, Naperville, IL 60564
Phone: (630) 904-9644

Home Services at The Home Depot

Peru, IL
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

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

Website: https://www.homedepot.com/l/Peru/IL/Peru/61354/1977/services
Address: 4242 Venture Dr, Peru, IL 61354
Phone: (815) 324-0183

Koolmaster Co. Inc.

La Salle, IL
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Glass Showers
  • Service icon Sliding Glass
  • Service icon Custom Window Designs
  • Service icon Full-Service Installations
  • Service icon Residential Windows
  • Service icon Commercial Windows

Website: https://www.koolmasterco.com/
Address: 300 2nd St, La Salle, IL 61301
Phone: (815) 223-8972

All Storm Solutions, Inc.

Naperville, IL
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Award-Winning
  • Pros icon Educational Website

Services Offered

  • Service icon Sliding Glass
  • Service icon Custom Window Designs
  • Service icon Full-Service Installations
  • Service icon Residential Windows
  • Service icon Aluminum Window Frames
  • Service icon Commercial Windows

Website: http://allstormsolutions.com/
Address: 1011 W Ogden Ave ste b, Naperville, IL 60563
Phone: (630) 541-5913

Home Services at The Home Depot

Algonquin, IL
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

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

Website: https://www.homedepot.com/l/Algonquin/IL/Algonquin/60102/1940/services
Address: 200 Randall Rd, Algonquin, IL 60102
Phone: (847) 773-0678

Advanced Window Systems

Rockford, IL
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Award-Winning
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

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

Website: https://www.advancedwindowrockford.com/
Address: 5401 E State St, Rockford, IL 61108
Phone: (815) 654-4200

Sunset Siding Windows & Roofing

St. Charles, IL
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Timely Service
  • Pros icon Free assessment

Services Offered

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

Website: https://sidingandwindows.com/
Address: 8N136 Citation Ct, St. Charles, IL 60175
Phone: (630) 377-7602

Window Liquidators.com

Aurora, IL
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

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

Website: http://www.windowliquidators.com/
Address: 764 Prairie St, Aurora, IL 60506
Phone: (855) 892-0543

Geneva Glass Works

Geneva, IL
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

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

Website: http://www.genevaglassworks.com/
Address: 560 Lark St, Geneva, IL 60134
Phone: (630) 232-1200

Window Well Services LLC

Elgin, IL
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

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

Website: https://www.windowwellservices.net/
Address: 1124 Fairwood Dr, Elgin, IL 60123
Phone: (630) 708-2925

Great Outlook Glass

Dundee, IL
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

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

Website: http://greatoutlookglass.com/
Address: 35W113 Frontenac Dr, Dundee, IL 60118
Phone: (224) 409-4421

Buffalo Roofing & Exteriors LLC

Oswego, IL
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Award-Winning
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

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

Website: https://www.buffalo-roofing.com/
Address: 31 Kendall Point Dr, Oswego, IL 60543
Phone: (630) 277-7244

Your Window Solutions

Lake in the Hills, IL
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

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

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

D-S Exteriors Inc.

Warrenville, IL
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

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

Website: http://www.dsexteriors.com/
Address: 27W376 Hoy Ave, Warrenville, IL 60555
Phone: (630) 665-1849

Country Glass, Inc.

Beloit, WI
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Timely Service
  • Pros icon Educational Website

Services Offered

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

Website: https://www.marvin.com/find-a-dealer/country-glass-inc-beloit-wi-0514-profile
Address: 1492 Huebbe Pkwy, Beloit, WI 53511
Phone: (608) 365-6550

City Glass Company, Inc.

Janesville, WI
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Glass Showers
  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Aluminum Window Frames
  • Service icon Commercial Windows

Website: http://cityglasswisconsin.com/
Address: 2536 Center Ave, Janesville, WI 53546
Phone: (608) 754-4411

How Installing Energy-Efficient Windows in Flagg Saves You Money

By upgrading to energy-efficient windows, you and your family can benefit in several ways, including:

  • Protect your investment: Upgrading your windows is an important part of maintaining your property and its value, especially if you have an older home.
  • Decrease your carbon footprint: By using less energy once switching to energy-efficient windows, you'll also be lowering your indirect greenhouse gas emissions by about 12%, according to Energy Star.
  • Save money on electricity bills: Because energy-efficient windows lower the amount of energy used to heat or cool your home, the switch can help you save about $309 annually on your energy bills in Flagg.
  • Protect your valuables: Many energy-efficient windows have low-emissivity coatings, which not only insulate your home better, but also filter out damaging UV rays, preventing fading of your furniture, carpet and other valuables.

Estimated Cost of Window Replacement in Flagg

When researching window installation, each company provides different services and costs. Let's go over some average costs and services.

How Much Do New Windows Cost?

The typical cost to install a single window is about $600 but can range from $200 to $1,200. This is due to the fact that the cost of window installations depend on several factors specific to your home, such as the size, material and number of windows you need to install, as well as the location of your property.

It's important to bear in mind that windows with the best efficiency may cost more initially but can save you hundreds of dollars by decreasing your energy bills. Investing in certified energy-efficient windows can save Flagg homeowners $309+ a year when replacing single-pane windows.

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

What Services do Window Installers Offer?

The first question to ask yourself when planning to replace your windows is: Should you get a full-frame installation or a pocket installation?

Full-frame installations are necessary when you want to change the style of your windows or your window has significant deterioration. With this service, your professionals will replace the total window, including the sill, trim and frame. A pocket installation involves installing a new window within the frame that's already there. So, instead of removing the whole window and rebuilding it, the installer will just slide the replacement window (also called a retrofit or insert window) into the frame.

If you're unsure which type of window installation service you need, your installer should be able to assist you. Generally, the choice depends on factors such as the age and condition of the home, the type of building material, budget and time restrictions.

Best Overall

Renewal by Andersen

★★★★★
4.5

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

Best Affordability

Window World

★★★★★
4.5

  • Lifetime warranty
  • EnergyStar Partner
  • Great industry reputation
  • Quality of service will depend on your area

Best Warranty

Universal Windows Direct

★★★★★
4

  • Lifetime warranty
  • Makes charitable contributions
  • Wide variety of products and services
  • Quality of service will depend on your area

How We Choose the Best Window Installers in Flagg

The EcoWatch Reviews team is different from other reviewers, as we're examining these companies through a sustainability lens. We've reviewed the best window installation companies in Flagg mainly based on their energy efficient offerings, as it's the most sustainable option and the best one for homeowners. Energy-efficient windows have been shown to cut 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 self-explanatory, but we've chosen to highlight window installers that serve the Flagg area so you can find the best window installation company near you.

Work Quality

We're certain that you're not looking for a company to do a shoddy job installing windows. We've vetted each installer on this list to make sure its technicians are well-qualified and that the company has received lots of positive customer feedback to vouch for its service.

Customer Reviews

We analyzed patterns in recent online reviews to find the companies with the highest rates of customer satisfaction. Customer satisfaction might be the most important factor, as it indicates the quality of services across nearly every category, including warranty, cost, quality of installation, quality of parts, professionalism and more.

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 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 to many homeowners. That's why window installation companies that have lengthy warranties for products, parts and labor rank higher with EcoWatch.

Years of Experience

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

Flagg, IL Window Replacement FAQs

What is the typical cost to install windows in a home?

The typical cost of replacing one window can range between $450 and $650. There are several factors that influence the price, which include the number of windows, local labor costs, how energy-efficient the windows are, the materials used in designing the windows, your property's location and styles and sizes of windows.

What are the most common types of replacement windows?

There are various types of windows you can get for your house, including double-hung and single-hung windows, transom windows, casement windows, slider windows, picture windows, awning windows and bay windows.

Can I replace my own windows?

If you're handy and have experience with installing a replacement window, you may be able to install your own windows. But if you don't have the time or skills, we recommend getting a professional to do it for you.

When is the best time of year to replace windows?

Although you can install windows any time of year, warmer weather is typically better for replacing windows. In addition, it shouldn't be raining, because rain can make the installation more difficult.

Should I replace my windows all at the same time?

If you want to get more efficient windows and save money on your energy bills, replacing all your windows at the same time is the only way to gain that benefit. On the other hand, if you have just a few windows that are damaged or leaky, you can replace just those.

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