30 Best Window Replacement Companies in Gardendale, AL (Mar 2023)
Window Companies Near Me

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

We analyzed all the top window installers in Gardendale and selected the top 30 based on:

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

By EcoWatch Local Advisors

Updated March 14, 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 best window replacement companies in Gardendale may not seem like the most captivating article on the EcoWatch site, but trust us, windows have a more direct impact on your life than you might think. According to the Department of Energy, heat or cool air lost through outdated, drafty windows could make up 25-30% of heating and cooling use.

Luckily, helping you save energy with efficient windows also aligns with our goals of reducing energy usage for the environment.

Because windows are so important for your home, selecting the best company for you is a big choice to make. That's why the EcoWatch team has put together this list of the top window replacement companies, so you can more easily make an informed decision.

Best Overall

Renewal by Andersen

★★★★★
4.5

  • Great industry reputation
  • Award-winning company
  • Member of US Green Building Council
  • No lifetime warranty

Best Affordability

Window World

★★★★★
4.5

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

Best Window Replacement Companies in Gardendale

The EcoWatch team examined dozens of installers across the country to find the top window companies for our readers. The companies in this article scored best in our review categories, which include energy-efficient offerings, local expertise, availability, customer service, price 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 Great industry reputation
  • Pros icon Award-winning company
  • Pros icon Member of US Green Building Council
Cons:
  • Pros icon No lifetime warranty

Renewal by Andersen provides the best availability in Gardendale. This provider has 27 years of experience in the windows business, and it has proved to be one of the most reputable companies in Gardendale. The company has a lot of positive reviews from customers on online review websites.

You may want to consider opting for Andersen if you're interested in 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

Renewal by Andersen is an Energy Star partner offering a variety of energy-efficient windows that are Energy Star certified. Note that not all of the company's windows are Energy Star certified, so make sure to mention that you want energy-efficient windows to your Andersen representative when inquiring about services.

How much does Renewal by Andersen cost in Gardendale?

Pricing details are not available on Andersen's website because the cost of window replacement varies greatly depending 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. You can request a free quote on its website for more information about the cost.

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

Window World

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

Window World has windows expertise in Gardendale. Window World has been in the window industry for around 27 years.

You may want to consider opting for Window World if you're looking for a installer 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 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. 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 Gardendale?

Prices aren't available 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 the cost.

Please note that the following companies are national, which means the quality of the service may vary depending on your local crew. We have tried to remain unbiased and transparent by including both pros and cons for each company.

More Window Replacement Companies in Gardendale

The Glass Guru

Moody, AL
4.8
★★★★★
  • Pros icon Dependable Service
  • Pros icon Award-Winning
  • Pros icon No-fee Quotes
  • Pros icon Helps Educate Customers

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/east-birmingham-al/
Address: 1000 Plantation Pkwy Suite 500, Moody, AL 35004
Phone: (205) 551-6382

Oak Mountain Glass

Pelham, AL
4.3
★★★★★
  • Pros icon Helps Educate Customers
  • Pros icon No-fee Quotes
  • Pros icon Excellent Customer Service
  • Pros icon Dependable Service

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 Full-Service Installations
  • Service icon Business Windows
  • Service icon Double-Hung
  • Service icon Sliding Glass

Website: https://oakmountainglass.com/
Address: 1005 Yeager Pkwy, Pelham, AL 35124
Phone: (205) 624-4144

Renewal by Andersen of Alabama

Pelham, AL
4.3
★★★★★
  • Pros icon No-fee Quotes
  • Pros icon Reliable Service
  • Pros icon Award-Winning
  • Pros icon Good Customer Service

Services Offered

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

Website: https://www.renewalbyandersen.com/window-company/985-alabama/retailer
Address: 108 Court Way, Pelham, AL 35124
Phone: (205) 624-8940

Southern Industries Home Improvements

Birmingham, AL
3.7
★★★★★
  • Pros icon Price Transparency
  • Pros icon No-fee Quotes
  • Pros icon Excellent Customer Service
  • Pros icon Reliable Service

Services Offered

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

Website: https://southernindustries.com/birmingham-al/
Address: 3515 Lorna Ridge Dr, Birmingham, AL 35216
Phone: (205) 890-3200

Window World of Central Alabama

Birmingham, AL
3.6
★★★★★
  • Pros icon Excellent Customer Service
  • Pros icon Timely Service
  • Pros icon No-Hassle Pricing
  • Pros icon Helps Educate Customers

Services Offered

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

Website: https://www.windowworldalabama.com/
Address: 135 W Valley Ave, Birmingham, AL 35209
Phone: (205) 916-2189

The Window Source of Birmingham

Birmingham, AL
3.6
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free Quotes
  • Pros icon Helps Educate Customers
  • Pros icon Reliable Service

Services Offered

  • Service icon Custom Windows
  • Service icon Architectural Glass
  • Service icon Sliding Glass
  • Service icon Double-Hung

Website: http://thewindowsourceofbirmingham.com/
Address: 3470 Wilburn Lake Rd, Birmingham, AL 35214
Phone: (205) 451-6646

Hoover Glass Services

Birmingham, AL
3.2
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Free Quotes
  • Pros icon Dependable Service

Services Offered

  • Service icon Residential Windows
  • Service icon Business Windows
  • Service icon Full-Service Installations
  • Service icon Custom Window Designs

Website: http://www.hooverglassservices.com/
Address: 2252 Rocky Ridge Rd, Birmingham, AL 35216
Phone: (205) 979-2208

Wisecrack Glass Repair, LLC

Trussville, AL
3.2
★★★★★
  • Pros icon Reliable Service
  • Pros icon No-fee Quotes
  • Pros icon Excellent Customer Service
  • Pros icon Helps Educate Customers

Services Offered

  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Business Windows
  • Service icon Double-Hung

Website: https://wisecrackglassrepair.com/
Address: 2801 Queenstown Rd Suite 113, Trussville, AL 35173
Phone: (205) 306-3648

Durante Home Exteriors

Trussville, AL
3.2
★★★★★
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Free Quotes
  • Pros icon Good Customer Service

Services Offered

  • Service icon Custom Windows
  • Service icon Glass Showers
  • Service icon Sliding Glass
  • Service icon Double-Hung

Website: http://www.godurante.com/
Address: 5061 Cardinal St, Trussville, AL 35173
Phone: (205) 956-4110

Xtreme Glass Tinting & Solar Control

Warrior, AL
3.1
★★★★★
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Free Quotes
  • Pros icon Excellent Customer Service

Services Offered

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

Website: http://www.xtremeglasstinting.com/
Address: 800 Lakeshore Cir, Warrior, AL 35180
Phone: (205) 849-7072

Glass Works Plus LLC

Birmingham, AL
3.1
★★★★★
  • Pros icon No-fee Quotes
  • Pros icon No-Hassle Pricing
  • Pros icon Excellent Customer Service
  • Pros icon Dependable Service

Services Offered

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

Website: https://www.gwplusllc.com/
Address: 5084 Pinson Valley Pkwy, Birmingham, AL 35215
Phone: (205) 681-9162

Over the Mountain Glass

Pelham, AL
3.0
★★★★★
  • Pros icon Locally Recognized for Quality
  • Pros icon Excellent Customer Service
  • Pros icon No-Hassle Pricing
  • Pros icon No-fee Quotes

Services Offered

  • Service icon Custom Windows
  • Service icon Residential Windows
  • Service icon Business Windows

Website: http://www.otmglass.com/
Address: 9190 Helena Rd, Pelham, AL 35124
Phone: (205) 733-8938

Champion Replacement Windows of Birmingham

Pelham, AL
3.0
★★★★★
  • Pros icon No-fee Quotes
  • Pros icon Award-Winning
  • Pros icon Excellent Customer Service
  • Pros icon Dependable Service

Services Offered

  • Service icon Custom Window Designs
  • Service icon Sliding Glass
  • Service icon Double-Hung

Website: https://www.championwindow.com/Birmingham/
Address: 309-H Cahaba Valley Pkwy N, Pelham, AL 35124
Phone: (205) 588-8754

Home Services at The Home Depot

Fairfield, AL
3.0
★★★★★
  • Pros icon Price Transparency
  • Pros icon Helps Educate Customers
  • Pros icon No-fee Quotes
  • Pros icon Good Customer Service

Services Offered

  • Service icon Custom Windows
  • Service icon Fast Delivery
  • Service icon Double-Hung

Website: https://www.homedepot.com/l/Fairfield/AL/Fairfield/35064/882/services
Address: 6405 Flintridge Dr, Fairfield, AL 35064
Phone: (205) 235-6915

Blair Exteriors

Birmingham, AL
2.8
★★★★★
  • Pros icon Helps Educate Customers
  • Pros icon Excellent Customer Service
  • Pros icon Price Transparency
  • Pros icon Locally Recognized for Quality

Services Offered

  • Service icon Custom Windows
  • Service icon Double-Hung

Website: http://www.blairexteriors.com/
Address: 4 W Oxmoor Rd, Birmingham, AL 35209
Phone: (205) 991-8555

Energyguard LLC

10+ years in business · Leeds, AL
2.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon No-fee Quotes
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Custom Windows
  • Service icon Aluminum Window Frames

Website: https://energyguardal.com/
Address: 10+ years in business · Leeds, AL
Phone: (205) 960-1882

Home Services at The Home Depot

Jasper, AL
2.8
★★★★★
  • Pros icon Excellent Customer Service
  • Pros icon Consistent Workmanship
  • Pros icon Free Quotes
  • Pros icon Helps Educate Customers

Services Offered

  • Service icon Custom Windows
  • Service icon Fast Delivery

Website: https://www.homedepot.com/l/Jasper-AL/AL/Jasper/35501/810/services
Address: 1808 Hwy 78 E, Jasper, AL 35501
Phone: (205) 235-6874

Thomasino Door & Window Inc

Pelham, AL
2.7
★★★★★
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free Quotes
  • Pros icon Excellent Customer Service

Services Offered

  • Service icon Custom Windows
  • Service icon Residential Windows
  • Service icon Double-Hung

Website: http://www.thomasinodoor.com/
Address: 2051 Oak Mountain Dr, Pelham, AL 35124
Phone: (205) 663-0366

Glass Doctor of Birmingham

Homewood, AL
2.7
★★★★★
  • Pros icon Helps Educate Customers
  • Pros icon Price Transparency
  • Pros icon No-fee Quotes
  • Pros icon Excellent Customer Service

Services Offered

  • Service icon Custom Windows
  • Service icon Commercial Windows
  • Service icon Double-Hung

Website: https://glassdoctor.com/birmingham/
Address: 237 Oxmoor Cir Ste 112, Homewood, AL 35209
Phone: (205) 290-0112

Pella Windows & Doors of Birmingham

Birmingham, AL
2.7
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free Quotes
  • Pros icon Educational Website
  • Pros icon No-Hassle Pricing

Services Offered

  • Service icon Custom Window Designs
  • Service icon Sliding Glass
  • Service icon Double-Hung

Website: http://www.pellabranch.com/alabama/showrooms/birmingham/
Address: 101 Distribution Dr, Birmingham, AL 35209
Phone: (205) 259-1960

EcoView Windows of Birmingham

Pelham, AL
2.7
★★★★★
  • Pros icon Helps Educate Customers
  • Pros icon Locally Recognized for Quality
  • Pros icon Good Customer Service
  • Pros icon Free Quotes

Services Offered

  • Service icon Custom Window Designs
  • Service icon Energy-Efficient Options
  • Service icon Double-Hung

Website: http://www.ecoviewwindows.com/alabama.html
Address: 40E Commerce Dr, Pelham, AL 35124
Phone: (205) 564-8480

Home Repair Service

Pelham, AL
2.7
★★★★★
  • Pros icon Price Transparency
  • Pros icon No-fee Quotes
  • Pros icon Excellent Customer Service
  • Pros icon Helps Educate Customers

Services Offered

  • Service icon Sliding Glass
  • Service icon Full-Service Installations
  • Service icon Custom Window Designs

Website: https://www.hrsbham.com/
Address: 2345 Pelham Pkwy, Pelham, AL 35124
Phone: (205) 358-4963

C&D Home Solutions

Hoover, AL
2.4
★★★★★
  • Pros icon Price Transparency
  • Pros icon No-fee Quotes
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

  • Service icon Custom Window Designs
  • Service icon Sliding Glass

Website: https://www.cdhomesolutions.com/
Address: 3417 Lorna Ln, Hoover, AL 35216
Phone: (205) 340-5786

America's Best Choice Windows of Birmingham

Trussville, AL
2.4
★★★★★
  • Pros icon Price Transparency
  • Pros icon Helps Educate Customers
  • Pros icon Free Quotes
  • Pros icon Excellent Customer Service

Services Offered

  • Service icon Custom Windows
  • Service icon Energy-Efficient Options

Website: https://abcwin.com/birmingham-al/
Address: Ivey Way, Trussville, AL 35173
Phone: (205) 655-6057

Cassidy Glass Inc.

Warrior, AL
2.4
★★★★★
  • Pros icon No-fee Quotes
  • Pros icon No-Hassle Pricing
  • Pros icon Educational Website
  • Pros icon Excellent Customer Service

Services Offered

  • Service icon Custom Window Designs
  • Service icon Double-Hung

Website: http://www.cassidyglassinc.com/
Address: 218 Caldwell Dr, Warrior, AL 35180
Phone: (205) 542-7866

Alabama Glass Magic LLC

Pinson, AL
2.4
★★★★★
  • Pros icon No-Hassle Pricing
  • Pros icon Good Customer Service
  • Pros icon No-fee Quotes
  • Pros icon Helps Educate Customers

Services Offered

  • Service icon Custom Window Designs
  • Service icon Tempered Glass

Website: http://www.alabamaglassmagic.com/
Address: 21525 AL-79, Pinson, AL 35126
Phone: (205) 796-7992

Southern Window Supply

Pelham, AL
2.3
★★★★★
  • Pros icon Educational Website
  • Pros icon Excellent Customer Service
  • Pros icon No-Hassle Pricing

Services Offered

  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Business Windows

Website: https://www.southernwindowsupply.com/
Address: 155 Winslett Rd, Pelham, AL 35124
Phone: (205) 945-9832

Holcombe Doors and Windows

Chelsea, AL
2.3
★★★★★
  • Pros icon Free Quotes
  • Pros icon Good Customer Service
  • Pros icon No-Hassle Pricing

Services Offered

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

Website: https://www.holcombedoorandwindow.com/chelsea/
Address: 120 Atchison Dr, Chelsea, AL 35043
Phone: (205) 509-4547

Hoover Windshield Repair

Birmingham, AL
2.2
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Consistent Workmanship
  • Pros icon Educational Website

Services Offered

  • Service icon Custom Windows

Website: https://www.hooverwindshieldrepair.com/
Address: 1550 Montgomery Hwy, Birmingham, AL 35216
Phone: (205) 835-7827

Dixie Window Mfg Co Inc

Birmingham, AL
2.0
★★★★★
  • Pros icon Helps Educate Customers
  • Pros icon No-Hassle Pricing

Services Offered

  • Service icon Custom Window Designs
  • Service icon Aluminum Window Frames
  • Service icon Double-Hung

Website: http://www.dixiewindow.com/
Address: 3201 28th Pl N, Birmingham, AL 35207
Phone: (205) 252-1751

How Installing Energy-Efficient Windows in Gardendale Saves You Money

When you upgrade to energy-efficient windows, you may see some perks, such as:

  • Decrease your carbon footprint: Decreasing how much energy you use also lowers your indirect greenhouse gas emissions. You could reduce it by about 635 pounds.
  • Protect your valuables: Many energy-efficient windows have low-emissivity coatings, which not only provide better insulation for your home, but also filter out harmful UV rays, preventing fading of your furniture, carpet and other valuables.
  • Save money on power bills: After you switch to 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.
  • Protect your investment: When your home is on the older side, your windows could also be outdated or drafty. Keeping your windows up to date is an important part of maintaining your property and its real estate value.

Estimated Cost of Window Replacement in Gardendale

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

How Much Do New Windows Cost?

Typically, homeowners in Gardendale can anticipate that most replacement window installations will range from $250 to $1,200, with the most common installations sitting at about $600. How much it will cost you varies based on several factors, like the location of your home, type, size, material, number of windows and more.

It's important to remember that windows with higher efficiency may cost more upfront but can save you hundreds of dollars by lowering your energy bills. Investing in Energy Star certified windows can save Gardendale homeowners $392+ a year when replacing single-pane windows.

Something else that affects the total cost is the material of the frame you choose. Aluminum frames are generally the least expensive and are sturdy and light, but they offer poor insulation. On the other hand, wood frames are the most expensive because they are aesthetically pleasing and offer decent insulation. Fiberglass and vinyl frames provide good insulation and cost somewhere between the other two.

What Services do Window Installers Offer?

The first step when considering a replacement is to clarify whether you want a full-frame or pocket installation.

Full-frame installations require replacing the entire window — the sill, frame, trim and all. These are typically done when you want to change the style of your window or when it has significant damage. Full-frame installations are more involved and will increase overall costs. A pocket installation entails replacing a window without replacing the frame. This means instead of removing the whole unit and rebuilding it, the contractor will just slide the replacement window (also called a retrofit or insert window) into the frame.

Your window installation company will be able to help you decide what's best for your needs. In Gardendale, the decision will mostly depend on the age of your windows and if there's any damage. Wood can decay if not maintained properly over the years, so it's good to have a professional evaluate your frames and window sills.

Best Overall

Renewal by Andersen

★★★★★
4.5

  • Great industry reputation
  • Award-winning company
  • Member of US Green Building Council
  • No lifetime warranty

Best Affordability

Window World

★★★★★
4.5

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

How We Choose the Best Window Installers in Gardendale

In our hunt to make your home improvements easier and more eco-friendly in Gardendale, EcoWatch examined many companies before landing on these. We have assessed the best window installers in Gardendale primarily based on energy efficiency, as it's what's best for the environment and for you as a homeowner. Energy-efficient windows can cut your power bills by hundreds of dollars. Along with energy efficiency, our rating methodology takes the following factors into consideration:

Service Area

Since this is a guide for Gardendale, we only included companies that provide services to the city. There are other reputable providers that didn't make the cut because of the low odds that they would serve the average homeowner in Gardendale.

Work Quality

We're willing to bet that you're not looking for a company to do a shoddy job installing windows. We've vetted each company featured on this list to make sure its contractors are well-qualified and that the company has gotten tons of positive customer feedback to vouch for its service.

Customer Reviews

Another self-explanatory yet very important review factor is customer feedback. If most customers don't have good things to say about their experience with 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 would like to keep costs low when possible. When analyzing providers' prices, we gave higher scores to companies with reasonable prices and accessible financing rather than "cheaper" services.

Warranty

As discussed previously, windows are a considerable investment, so you'll want to be certain that investment is protected. Window installation companies that offer lengthy warranties for products, parts and labor rank higher with EcoWatch.

Years of Experience

Last but not least, we like to see companies that have a proven track record in the industry. Window installers that have more experience earn higher rankings by our standards. We like to see at least ten years of experience.

Gardendale, AL Window Replacement FAQs

How much does window installation cost?

The national average cost to install a single window is about $600 but can range between $200 and $1,200, based on a few different factors. The price is often influenced by the type and material of the window, the size of the window and the location of your property. 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 kind of window is the most energy-efficient?

Generally, double-pane windows will be more efficient than single-pane windows and windows that don't open will be more efficient than windows that do. If you want to be sure you'll have the most energy-efficient windows, look for models that have the blue Energy Star certification attached to them — they're certified energy-efficient by the U.S. Department of Energy.

What services do window replacement companies do?

Window installation companies will do the entire process — from replacing your old windows with new ones to cleaning up after the windows have been put in place. In addition, some companies offer window manufacturing, customization and repairs.

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 open or close, they may need to be replaced.

Should I replace my windows all at the same time?

If you're upgrading your windows because of energy-efficiency, replacing all your windows at once is the only way to gain that benefit. However, if you have just a few windows that are damaged or drafty, you can replace just those.

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