20 Best Window Companies in Old Tappan, NJ (2023 Reviews)

Are you thinking about replacing your windows? Our guide to the top window installation companies can help you narrow down which one to pick.

We analyzed all the top-rated window companies in Old Tappan 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.

The EcoWatch team is all about finding solutions for eco-conscious homeowners in Old Tappan. Outdated windows can cost you in energy bills. As a matter of fact, the Department of Energy estimates that about 30% of your house's heat or cool air could be lost through your windows.

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

Efficient windows are especially important in Old Tappan, 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 $285 per year.

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 Old Tappan

The EcoWatch Reviews team evaluated dozens of companies that serve the Old Tappan area to find the top window installation companies by our standards. The installers mentioned in this article scored best in our review categories, such as energy-efficient offerings, price, availability, customer service, local expertise 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 is the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has about 27 years of experience in the window installation industry.

If you’re looking for a company that is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital, Window World may be the company for you.

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 Old Tappan?

Pricing information is not available on Window World’s website, as the cost of window installment depends 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. You can inquire about a free quote on its website for more information about pricing.

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 has the best availability in Old Tappan. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has been in the window installation industry for about 27 years. The company has a lot of glowing reviews from customers on online review websites.

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 right company for you.

Energy Efficiency of Renewal by Andersen Windows

There are a wide range of window types available from Renewal by Andersen, some of which are Energy Star products. A handful of windows manufactured by the Andersen corporation were awarded Energy Star’s “Most Efficient” in 2021, and Andersen was named Energy Star’s Partner of the Year in 2019.

How much does Renewal by Andersen cost in Old Tappan?

Prices are not available on Andersen’s website since the cost of window replacement depends 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 ask for a quote on the company’s website.

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 Many years of experience
  • Pros icon Great industry reputation
  • Pros icon Low number of customer complaints
  • Pros icon Manufactures products in-house
  • Pros icon Custom Designs
Cons:
  • Pros icon No lifetime warranty
  • 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 window installation company has been operating since 1999 and currently provides services to 13 states and Washington D.C. Its reputation is backed by several positive reviews on customer review websites.

If you’re looking for a company that installs windows and doors at businesses across the Eastern U.S, Aeroseal may be the provider for you.

Energy Efficiency of Aeroseal Windows Windows

Aeroseal Windows is an Energy Star partner with a variety of energy-efficient windows. 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 Aeroseal representative when inquiring about services.

How much does Aeroseal Windows cost in Old Tappan?

Pricing details are not available on Aeroseal’s website, as the cost of window replacement depends on how many and what type(s) of windows you need. However, it provides high-quality windows at a competitive price point. For more accurate information on pricing, you can inquire about a quote from the company.

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 has the best warranty in Old Tappan. 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 installation industry for about 20 years. The company has a lot of glowing reviews from customers on online review websites.

If you’re looking for a company that has an industry-leading warranty covering products, parts and workmanship for life, Universal may be the right company for you.

Energy Efficiency of Universal Windows Direct Windows

There are a wide range of window types available from Universal Windows Direct, some of which are Energy Star products. 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 Old Tappan?

Prices are not available on Universal’s website since the cost of window replacement depends on how many and what type(s) of windows you need. However, 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. If you’d like more accurate information, you can ask for a quote on the company’s website.

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

More Window Companies in Old Tappan

Renewal by Andersen

Stamford, CT
4.3
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

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

Website: https://www.renewalbyandersen.com/window-company/710-westchester/retailer
Address: 2041 W Main St, Stamford, CT 06902
Phone: (203) 406-0545

Window World Westchester

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

Website: https://www.windowworldwestchester.com/
Address: 134 Marbledale Rd, Tuckahoe, NY 10707
Phone: (914) 750-4353

Glass Doctor of Ramsey

Ramsey, NJ
4.3
★★★★★
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

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

Website: https://glassdoctor.com/ramsey
Address: 75 Orchard St, Ramsey, NJ 07446
Phone: (201) 825-4600

J. Salvatore & Sons Roofing

Yonkers, NY
4.3
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

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

Website: http://nyroofer.com/
Address: 1187 Yonkers Ave, Yonkers, NY 10704
Phone: (718) 548-0100

Home Supply Window & Door

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

Services Offered

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

Website: https://www.hswindows.com/
Address: 160 Van Winkle Ave, Hawthorne, NJ 07506
Phone: (973) 949-5401

Donny's Home Improvement

Elmwood Park, NJ
4.3
★★★★★
  • 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 Residential Windows
  • Service icon Glass Showers
  • Service icon Commercial Windows
  • Service icon Window Replacement
  • Service icon Custom Window Designs

Website: https://donnysroofing.com/
Address: 30 16th Ave, Elmwood Park, NJ 07407
Phone: (973) 333-6364

Aspen Home Remodeling, LLC.

Oradell, NJ
4.2
★★★★★
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Good Customer Service

Services Offered

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

Website: https://www.aspenhomeremodelingllc.com/
Address: 700 Kinderkamack Rd #101, Oradell, NJ 07649
Phone: (201) 994-5354

Aluminum Windows

Elmwood Park, NJ
4.2
★★★★★
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Free assessment

Services Offered

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

Website: http://www.deluxewindows-nj.com/
Address: 104 Orchard St, Elmwood Park, NJ 07407
Phone: (973) 233-4188

Window Repair, Replacement & Installation

Fair Lawn, NJ
4.2
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

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

Website: http://deluxewindows-nj.com/
Address: 3300 Broadway #433a, Fair Lawn, NJ 07410
Phone: (201) 381-4719

Home Windows Replacement & Installation

Saddle Brook, NJ
4.2
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

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

Website: http://deluxewindows-nj.com/
Address: 112b US-46, Saddle Brook, NJ 07663
Phone: (201) 249-6391

House Window Replacement & Installation

Paramus, NJ
4.0
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

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

Website: http://deluxewindows-nj.com/
Address: 11-13 Sunflower Ave third floor, Paramus, NJ 07652
Phone: (201) 472-5698

Starlite Window

Paterson, NJ
4.0
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

  • Service icon Custom Window Designs
  • Service icon Fast Delivery
  • Service icon Residential Windows
  • Service icon Window Replacement
  • Service icon Aluminum Window Frames
  • Service icon Double-Hung

Website: http://starlitewindowsandcabinets.com/
Address: 50 E 25th St, Paterson, NJ 07514
Phone: (973) 278-9366

Deluxe Windows & Doors

Garfield, NJ
4.4
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

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

Website: http://deluxewindows-nj.com/
Address: 229 Harrison Ave, Garfield, NJ 07026
Phone: (973) 340-7667

M & R Windows

Bronx, NY
4.1
★★★★★
  • Pros icon Price Transparency
  • Pros icon Timely Service

Services Offered

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

Website: http://mandrwindows.com/
Address: 4510 Bullard Ave, Bronx, NY 10470
Phone: (718) 652-1300

Adriatic Home Improvement

Garfield, NJ
4.1
★★★★★
  • Pros icon Free assessment
  • Pros icon Timely Service
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

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

Website: http://www.adriatichomepro.com/
Address: 60 Center Ct, Garfield, NJ 07026
Phone: (888) 959-9842

Vinyline Windows and Doors

Yonkers, NY
3.7
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

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

Website: http://www.vinylinewindowsanddoors.com/
Address: 636 Saw Mill River Rd, Yonkers, NY 10710
Phone: (914) 476-3500

Home Services at The Home Depot

Paterson, NJ
3.7
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

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

Website: https://www.homedepot.com/l/Paterson/NJ/Paterson/07514/959/services
Address: 75 McLean Blvd, Paterson, NJ 07514
Phone: (973) 453-5688

Pella Window and Door Showroom of Paramus, NJ

Paramus, NJ
3.7
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

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

Website: https://www.pella.com/locations/nj/paramus/
Address: 483 NJ-17, Paramus, NJ 07652
Phone: (201) 225-1385

American Windows Plus Inc

White Plains, NY
4.3
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

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

Website: https://www.americanwindowsplus.com/
Address: 169 mamaroneck ave 2fl # 11, White Plains, NY 10601
Phone: (646) 875-6737

Casa Blanca General Contractor's Llc

E 1st St, NJ
4.1
★★★★★
  • Pros icon Price Transparency
  • Pros icon Timely Service
  • Pros icon Free assessment
  • Pros icon Good Customer Service

Services Offered

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

Website: http://casablancageneralcontractorsllc.com/
Address: 359East, E 1st St, Clifton, NJ 07011
Phone: (862) 249-0299
Old Tappan Window Cost Calculator

Calculate how much you can expect to pay for window installation and replacement in Old Tappan, NJ 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 Old Tappan Saves You Money

Energy-efficient windows can provide benefits in more than one way. Here are some reasons you may want to consider making the switch:

  • Better temperature control in your home: When you reside in a city like Old Tappan where the winters can get very cold, you often have to rely on your heater to keep your home warm. Energy-efficient windows can decrease how hard your heater needs to work to heat your home.
  • Protect your investment: The older your home is, the more likely it is that getting new windows will benefit you. Older homes usually have windows that are outdated, drafty or potentially even damaged in some way. Updating your windows could help increase the value of your property if you decide to sell.
  • 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 your furniture, carpet and other valuables from fading.
  • Save money on power bills: Switching to energy-efficient windows lowers your energy bills by about 12% since you use less energy.

Estimated Cost of Window Replacement in Old Tappan

Let's take a look at the cost of replacing your windows and the types of services offered by installers.

How Much Do New Windows Cost?

According to our research, the typical cost of installing a single window is about $600. However, window replacement costs can range from $200 to $1,200 per window. This is because of the fact that the cost of window installations depend on several factors specific to your home, like the size, material and number of windows you need to replace, as well as where your property is located.

With windows, efficiency is one of the most important factors for most homeowners. Efficient windows may cost more off the bat, but by increasing the efficiency of your home — particularly during the summer and winter — they can give you many years of energy savings. According to Energy Star, buying certified energy-efficient windows can save Old Tappan homeowners $285+ each year after replacing single-pane windows.

We advise requesting free quotes from multiple window installation companies to find the one that works best for you.

What Services do Window Installers Offer?

When it comes to window installations, there are typically two types that your installer will have: full-frame and pocket installations.

Full-frame installations involve replacing the whole window — the sill, frame, trim and all. These are typically done when you want a new style for your windows or when it has a great amount of deterioration. Full-frame installations require more time and labor and will increase overall costs. Pocket installations (or retrofits) entail replacing a window within the existing frame, which makes pocket installations take less time and therefore cost less. But, if the frame has any rot or deterioration, you should opt for a full-frame installation instead.

If you're not sure which type of window installation service you need, your installer can assist you. In general, the choice is influenced by factors such as the age and condition of the home, the type of building material, budget and time restrictions.

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 Old Tappan

In our search to make your home improvements easier and more eco-friendly in Old Tappan, EcoWatch examined many companies before deciding on these. We've reviewed the top window installers in Old Tappan mostly based on energy efficiency, as it's what's best for the environment and for you as a homeowner. Energy Star certified windows can lower energy bills by hundreds of dollars. Along with energy efficiency, our rating methodology is based on the following factors:

Service Area

This one is pretty self-explanatory, but we've chosen to highlight window installers that serve Old Tappan so you can find the best window installation company near you.

Work Quality

When selecting new windows, the quality and range of services can often play just as important of a role in overall efficiency and performance as the type of window you choose. 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

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

Cost

This one is a give-and-take: similar to most services, cheap window installation companies won't always provide the highest quality service. On the other hand, we want to make sure we're highlighting companies that provide a wide range of price and financing options so they're accessible to most homeowners.

Warranty

Protecting your investment in new windows is important. For that reason, window installation companies that offer 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 good track record in the industry. Window installation companies that have more years of experience earn higher rankings by our standards. We like to see at least ten years of experience.

Old Tappan, NJ Window Replacement FAQs

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

The national average cost to replace a window is around $600 but can range from $200 to $1,200, depending on a variety of factors. The price is typically influenced by the size of the window, the location of your property and the type and material of the window. Also, keep in mind that energy-efficient windows may cost more initially but can save you a decent amount of money a year in energy bills.

Which type of window should I get?

Generally, double-pane windows will be 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 with the blue Energy Star certification — they're certified energy-efficient by the U.S. Department of Energy.

When do I have to use a window installation company?

You should use a window installation company whenever you want to upgrade your windows. Installing windows is a involved process that can take a lot of time, so it's best left to the professionals.

Should I replace my windows all at once?

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

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