23 Best Window Replacement Companies in Littleton, MA (Feb 2023)
Window Companies Near Me

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

We analyzed all the top window installers in Littleton and selected the top 23 based on:

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

By EcoWatch Local Advisors

Updated January 12, 2023

Why you can trust EcoWatch

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

A guide on the top window installation companies in Littleton may not seem like the most captivating article on EcoWatch, but trust us, windows impact your life more than you might think. If your windows are drafty or damaged, you could be losing 25-30% of your house's heat or cool air out of them.

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

We've put together this guide on the top installation companies to help you in your search, so you can not only enjoy brand new windows, but also save money on your energy bills.

Best Overall

Renewal by Andersen

★★★★★
4.5

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

Best Affordability

Window World

★★★★★
4.5

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

Best for Businesses

Aeroseal Windows

★★★★★
4

  • Low number of customer complaints
  • Great industry reputation
  • Custom Designs
  • Not ideal for residential installations

Best Window Replacement Companies in Littleton

The EcoWatch Reviews team assessed dozens of providers that service the Littleton area to find the top window installation companies by our standards. The providers mentioned in this article passed our review standards for energy-efficient offerings as well as price, local expertise, customer service and beyond.

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

Renewal by Andersen provides the best availability in Littleton. Andersen has around 27 years of experience in the industry, and it currently serves nearly every state except Mississippi and West Virginia. The company has a lot of positive reviews from customers online.

Andersen may be the company for you if you're looking for one 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

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. Not all of Andersen's windows are Energy Star certified, so make sure you mention that you're interested in Energy Star windows when inquiring.

How much does Renewal by Andersen cost in Littleton?

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. 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 Low prices relative to competitors
  • Pros icon EnergyStar Partner
Cons:
  • Pros icon Quality of service will depend on your area

Window World is the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has been in the window business for around 27 years. Many positive reviews on customer review websites back the company's reputation.

You may want to consider choosing Window World if you're interested in 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

There are a wide range of window types that Window World offers, 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 Littleton?

Prices are not available on Window World's website, as the cost of window installment varies greatly based on how many and what type(s) of windows you need. However, it's known for offering some of the most affordable window installations around. The best way to get more accurate information is to receive a free quote from the company.

Aeroseal Windows logo
FAST QUOTE
as little as 30 seconds
Best for Businesses

Aeroseal Windows

★★★★★
BBB Rating: A+
Locations: Regional
Founded: 1999
Pros:
  • Pros icon Low number of customer complaints
  • Pros icon Great industry reputation
  • Pros icon Custom Designs
Cons:
  • Pros icon Not ideal for residential installations

Aeroseal Windows is an installer that mainly serves commercial and multifamily properties, and also specializes in railings. If you’re looking for residential window installations, you should probably refer to one of the other companies on this list. This provider has 23 years of experience in the window installation business, and it has established itself as one of the best companies in Littleton.

Aeroseal may be the company for you if you want one that installs windows and doors at businesses across the Eastern U.S.

Energy Efficiency of Aeroseal Windows Windows

There are a wide variety of window types available from Aeroseal Windows, some of which are Energy Star products. The company claims it helps businesses save on energy expenses and reduce their carbon footprints with energy-efficient windows, as well as practices like Low-E glass coating, weatherstripping and more.

How much does Aeroseal Windows cost in Littleton?

Aeroseal does not mention prices on its website, but it provides high-quality windows at a competitive price point. 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 has the best residential windows in Littleton. 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 industry for about 16 years. Its reputation is backed by a considerable amount of positive reviews on customer review websites.

You may want to consider going with Window Nation if you're interested in a installer 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 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 be sure to mention that you want energy-efficient windows to your Window Nation representative when inquiring about services.

How much does Window Nation cost in Littleton?

Even though pricing information is not available on Window Nation's website, 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 strive to remain unbiased and transparent by listing pros and cons for every provider. Additionally, any partnerships do not influence our rankings.

More Window Replacement Companies in Littleton

Coastal Windows & Exteriors

Beverly, MA
4.8
★★★★★
  • Pros icon Locally Recognized for Quality
  • Pros icon Excellent Customer Service
  • Pros icon Price Transparency
  • Pros icon Free Quotes

Services Offered

  • Service icon Architectural Glass
  • Service icon Fast Delivery
  • Service icon Energy-Efficient Options
  • Service icon Custom Windows
  • Service icon Aluminum Window Frames
  • Service icon Double-Hung
  • Service icon Stained Glass
  • Service icon Sliding Glass

Website: https://mycoastalwindows.com/
Address: 236 Cabot St, Beverly, MA 01915
Phone: (978) 861-3019

Renewal by Andersen of Boston

Northborough, MA
4.6
★★★★★
  • Pros icon Excellent Customer Service
  • Pros icon Reliable Service
  • Pros icon Price Transparency
  • Pros icon Award-Winning

Services Offered

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

Website: https://www.renewalbyandersen.com/window-company/096-boston-ma/about-us
Address: 30 Forbes Rd, Northborough, MA 01532
Phone: (508) 351-2236

Northeast Home & Energy

North Grafton, MA
4.3
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Reliable Appointment Windows
  • Pros icon Locally Recognized for Quality
  • Pros icon Educational Website

Services Offered

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

Website: https://www.northeast-home.com/
Address: 21 N Main St, North Grafton, MA 01536
Phone: (508) 839-7001

NEWPRO

Woburn, MA
4.1
★★★★★
  • Pros icon Educational Website
  • Pros icon Excellent Customer Service
  • Pros icon Free Quotes
  • Pros icon Reliable Service

Services Offered

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

Website: https://www.newpro.com/contact-us/woburn/
Address: 26 Cedar St, Woburn, MA 01801
Phone: (781) 933-4100

NEWPRO

Wrentham, MA
4.1
★★★★★
  • Pros icon Excellent Customer Service
  • Pros icon Consistent Workmanship
  • Pros icon Reliable Appointment Windows
  • Pros icon Educational Website

Services Offered

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

Website: https://www.newpro.com/contact-us/wrentham/
Address: 475 Washington St, Wrentham, MA 02093
Phone: (781) 897-0850

Shine Construction Inc

Uxbridge, MA
4.1
★★★★★
  • Pros icon No-Hassle Pricing
  • Pros icon Reliable Appointment Windows
  • Pros icon Educational Website
  • Pros icon Free Quotes

Services Offered

  • Service icon Residential Windows
  • Service icon Custom Windows
  • Service icon Full-Service Installations
  • Service icon Commercial Windows
  • Service icon Double-Hung

Website: https://www.shineconstructioninc.com/
Address: 301 N Main St, Uxbridge, MA 01569
Phone: (508) 278-3300

Shine Construction Inc

Uxbridge, MA
4.1
★★★★★
  • Pros icon Educational Website
  • Pros icon Dependable Service
  • Pros icon Award-Winning
  • Pros icon No-Hassle Pricing

Services Offered

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

Website: https://www.shineconstructioninc.com/
Address: 301 N Main St, Uxbridge, MA 01569
Phone: 301 N Main St

Nashua Glass

Nashua, NH
4.1
★★★★★
  • Pros icon Free Quotes
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon No-Hassle Pricing

Services Offered

  • Service icon Residential Windows
  • Service icon Architectural Glass
  • Service icon Tempered Glass
  • Service icon Doors
  • Service icon Custom Window Designs
  • Service icon Business Windows
  • Service icon Double-Hung
  • Service icon Sliding Glass

Website: http://www.nashuaglass.com/
Address: 110 Chestnut St, Nashua, NH 03060
Phone: (603) 882-0648

Northern Glass LLC

Ipswich, MA
4.1
★★★★★
  • Pros icon No-Hassle Pricing
  • Pros icon No-fee Quotes
  • Pros icon Timely Service
  • Pros icon Excellent Customer Service

Services Offered

  • Service icon Residential Windows
  • Service icon Glass Showers
  • Service icon Tempered Glass
  • Service icon Doors
  • Service icon Custom Windows
  • Service icon Full-Service Installations
  • Service icon Business Windows
  • Service icon Sliding Glass

Website: https://northern-glass.com/
Address: 29 Hayward St, Ipswich, MA 01938
Phone: (978) 356-7942

Window World of Boston

Woburn, MA
3.9
★★★★★
  • Pros icon Award-Winning
  • Pros icon Free Quotes
  • Pros icon Good Customer Service
  • Pros icon Dependable Service

Services Offered

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

Website: https://www.windowworldofboston.com/
Address: 15 A Cummings Park Dr, Woburn, MA 01801
Phone: (781) 202-6460

Window World of Boston

Shrewsbury, MA
3.9
★★★★★
  • Pros icon Reliable Appointment Windows
  • Pros icon Dependable Service
  • Pros icon Award-Winning
  • Pros icon Educational Website

Services Offered

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

Website: https://www.windowworldofboston.com/
Address: Shrewsbury, MA
Phone: (508) 217-9934

UBrothers Construction

Framingham, MA
3.9
★★★★★
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Excellent Customer Service
  • Pros icon No-fee Quotes

Services Offered

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

Website: https://ubrothersconstruction.com/
Address: 6 Temple St, Framingham, MA 01702
Phone: (800) 984-2667

Mr. Handyman of Central - Eastern Norfolk County & S.Shore

Walpole, MA
3.9
★★★★★
  • Pros icon Timely Service
  • Pros icon No-Hassle Pricing
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

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

Website: https://www.mrhandyman.com/central-eastern-norfolk-county-south-shore/
Address: 940 East St, Walpole, MA 02081
Phone: (508) 465-2092

Bruin Corp. of Framingham

Ashland, MA
3.8
★★★★★
  • Pros icon Dependable Service
  • Pros icon Helps Educate Customers
  • Pros icon Arrives on Time
  • Pros icon No-fee Quotes

Services Offered

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

Website: https://www.bruincorp.net/
Address: 208 Pond St, Ashland, MA 01721
Phone: (508) 881-8200

Timberlane Glass and Mirror

Plaistow, NH
3.7
★★★★★
  • Pros icon Free Quotes
  • Pros icon Good Customer Service
  • Pros icon Dependable Service
  • Pros icon Price Transparency

Services Offered

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

Website: http://www.timberlaneglass.com/
Address: 108 Main St, Plaistow, NH 03865
Phone: (603) 382-6969

King Shade & Window Co.

West Roxbury, MA
3.7
★★★★★
  • Pros icon Reliable Service
  • Pros icon No-fee Quotes
  • Pros icon Educational Website
  • Pros icon Excellent Customer Service

Services Offered

  • Service icon Double-Hung
  • Service icon Full-Service Installations
  • Service icon Custom Windows
  • Service icon Commercial Windows
  • Service icon Energy-Efficient Options
  • Service icon Architectural Glass

Website: https://www.kingshadeandwindow.com/
Address: 1764 Centre St, West Roxbury, MA 02132
Phone: (617) 323-0600

Pella Windows & Doors of Boylston

Boylston, MA
3.7
★★★★★
  • Pros icon Educational Website
  • Pros icon Award-Winning
  • Pros icon No-fee Quotes
  • Pros icon No-Hassle Pricing

Services Offered

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

Website: https://www.pellabranch.com/western-massachusetts/showrooms/boylston/
Address: 280 Shrewsbury St, Boylston, MA 01505
Phone: (508) 842-1112

Weaver Glass LLC

Beverly, MA
3.6
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free Quotes
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

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

Website: https://www.weaverglassllc.com/
Address: 393 Rantoul St, Beverly, MA 01915
Phone: (978) 922-5511

Boston Glass Group

Chestnut Hill, MA
3.6
★★★★★
  • Pros icon Dependable Service
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon No-fee Quotes

Services Offered

  • Service icon Residential Windows
  • Service icon Tempered Glass
  • Service icon Doors
  • Service icon Custom Windows
  • Service icon Commercial Windows
  • Service icon Double-Hung
  • Service icon Sliding Glass

Website: https://www.bostonglassgroup.com/
Address: 801 Boylston St, Chestnut Hill, MA 02467
Phone: (617) 505-6091

Guaranty Glass and Mirror

Spencer, MA
3.6
★★★★★
  • Pros icon Excellent Customer Service
  • Pros icon No-Hassle Pricing
  • Pros icon Free Quotes
  • Pros icon Dependable Service

Services Offered

  • Service icon Residential Windows
  • Service icon Architectural Glass
  • Service icon Custom Window Designs
  • Service icon Aluminum Window Frames
  • Service icon Business Windows
  • Service icon Double-Hung
  • Service icon Sliding Glass

Website: https://www.google.com/aclk
Address: Spencer, MA
Phone: (508) 834-6991

Rite Window

Woburn, MA
3.6
★★★★★
  • Pros icon Locally Recognized for Quality
  • Pros icon Helps Educate Customers
  • Pros icon Good Customer Service
  • Pros icon Reliable Service

Services Offered

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

Website: https://ritewindow.com/
Address: 7 Roessler Rd, Woburn, MA 01801
Phone: (781) 491-0419

Pro Entry Installs LLC

Salem, NH
3.6
★★★★★
  • Pros icon Excellent Customer Service
  • Pros icon Educational Website
  • Pros icon Arrives on Time
  • Pros icon Consistent Workmanship

Services Offered

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

Website: https://proentry.com/
Address: 7 Cassidy Ave #2863, Salem, NH 03079
Phone: (603) 765-1312

Window World of New Hampshire

Manchester, NH
3.6
★★★★★
  • Pros icon Price Transparency
  • Pros icon Supports Charities
  • Pros icon Free Quotes
  • Pros icon Dependable Service

Services Offered

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

Website: https://www.windowworldnewhampshire.com/
Address: 735 E Industrial Park Dr Unit A, Manchester, NH 03109
Phone: (603) 935-9878

How Installing Energy-Efficient Windows in Littleton Saves You Money

There are several benefits of switching to energy-efficient windows. A few reasons you may want to consider making the change include the following:

  • Protect your investment: The older your home is, the more likely it is that switching to energy-efficient windows will benefit you. Older homes usually have windows that are outdated, drafty or maybe even damaged in some way. Updating your windows could help increase the value of your home if you decide to sell.
  • Reduce your carbon footprint: Decreasing how much energy you use also lowers your indirect greenhouse gas emissions. You could reduce it by about 139 pounds.
  • Save money on electricity bills: Switching to energy-efficient windows reduces your energy bills by about 12% because you need less energy.
  • Protect your valuables from fading: The low-emissivity coatings on some energy-efficient windows filter out damaging UV rays, preventing your furniture, carpet and other valuables from fading.

Estimated Cost of Window Replacement in Littleton

Windows come in different purposes, shapes and styles, so costs and services will vary tremendously depending on your project. Below, we detail the average cost and services that you'll find from window replacement companies.

How Much Do New Windows Cost?

According to our research, the typical cost of installing a single window is around $600. However, window replacement costs can range from $200 to $1,200 for each window. But costs will vary considerably based on the quality of your products, the current condition of your home, your location and the number of windows you need. Many window companies also offer replacement door installations and other add-ons like shutters, coating, baths and more. Additional services will increase your overall project costs.

It's also worth noting that energy-efficient windows will cost more initially, but Energy Star estimates that upgrading the windows on your Littleton home translates to an average energy savings of $236 to $319 per year for single-pane window replacement, or between $87 to $126 per year for double-pane windows. How much you'll save by upgrading to energy-efficient windows varies based on your local climate, energy rates and other factors unique to your home.

How much your window installation costs will also vary depending on the type of material you choose for the frames. Wood windows are usually the most expensive, although it depends if they are completely wood or clad with aluminum or vinyl. Fiberglass windows also tend to be a bit more expensive than vinyl, but they are shown to be more efficient.

What Services do Window Installers Offer?

The first step when planning a replacement is to think about whether you should get a full-frame or pocket installation.

A full-frame installation replaces the entire window, such as the windowsill, frame, trim and the window panes. As this type of installation requires more time and labor, it will be more expensive than a pocket installation. Pocket installations (also known as retrofits) are when you replace a window within its existing 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.

Your window installation company will be able to advise you on the best type for your project. In Littleton, the choice will mostly be influenced by how much damage there is currently and the age of your existing frames.

Best Overall

Renewal by Andersen

★★★★★
4.5

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

Best Affordability

Window World

★★★★★
4.5

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

Best for Businesses

Aeroseal Windows

★★★★★
4

  • Low number of customer complaints
  • Great industry reputation
  • Custom Designs
  • Not ideal for residential installations

How We Choose the Best Window Installers in Littleton

In our hunt to find the most reliable, eco-friendly window installers in Littleton, the EcoWatch Reviews team examined many companies before landing on these. Along with energy efficiency, we assessed window companies all across the state and ranked them based on the following methodology:

Service Area

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

Work Quality

When choosing new windows, the quality and breadth of services can often play just as important of a role in overall efficiency and performance as the brand of window you get. We do give window installers higher marks if they offer high-quality products, but we also factor in workmanship as reflected in customer feedback.

Customer Reviews

We analyzed patterns in recent customer feedback to find the companies with the most customer satisfaction, weighted by sample size. Customer satisfaction may be the factor we place the most value on, as it indicates the quality of services across nearly every category, including quality of parts, cost, quality of installation, warranty, professionalism and more.

Cost

Cheaper windows certainly don't mean better windows, but we know many of our readers want to keep costs as low as possible. When analyzing the prices of providers, 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 to many homeowners. That's why window installation companies with lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.

Years of Experience

Last but not least, we like to see companies that have a 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.

Littleton, MA Window Replacement FAQs

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

The average cost to install one window ranges between $450 and $650. There are several factors that influence how much it costs, such as how energy-efficient the windows are, the materials used in designing the windows, the number of windows, styles and sizes of windows, your property's location and local labor costs.

Which kind of window should I get?

Generally, double-pane windows are more efficient than single-pane windows and windows that do not 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 — that means they're certified energy-efficient by the U.S. Department of Energy.

What do window installers do?

Window installation companies will do the entire process — from replacing old windows with new ones to cleaning up afterward. In addition, many companies offer window manufacturing, customization and repairs.

When is the best time of year to replace windows?

Though you can install windows any time of year, warmer weather is often better for replacing windows. In addition, the weather should be dry, as rain can make the installation harder.

How often should you replace windows?

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

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