20 Best Window Companies in Merrimack, NH (2023 Reviews)

Are you thinking of upgrading your windows? Our list of the top window installation companies can help you narrow down which one to pick.

We analyzed all the top-rated window companies in Merrimack 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 helping Merrimack homeowners make their homes more eco-friendly. Drafty windows can reduce your home's energy efficiency by up to 30%, according to the Department of Energy. In Merrimack, that's about $463 per year that you could save on your electric bills by making the switch.

Installing energy-efficient windows on your house can help you save money each month on your electricity bills — and you can help the environment, too.

Unlike other review sites, EcoWatch ranks window companies based on energy efficiency while also factoring in cost, customer satisfaction and service area.

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 Merrimack

The EcoWatch Reviews team evaluated dozens of providers that service the Merrimack area to find the top window installation companies by our standards. The providers in this article scored best in our review categories, such as energy-efficient offerings, price, local expertise, availability, customer service and more.

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

Window World

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

Window World provides windows expertise in Merrimack. It's the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has been in the window installation business for around 27 years. Its reputation is backed by hundreds of positive reviews on customer review websites.

It 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 Merrimack?

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

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

Renewal by Andersen

★★★★★
BBB Rating: A
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon Great industry reputation
  • Pros icon Award-winning company
  • Pros icon Member of US Green Building Council
  • Pros icon Manufactures products in-house
Cons:
  • Pros icon No lifetime warranty
  • Pros icon More expensive than competition

Renewal by Andersen provides the best availability in Merrimack. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has been in the window installation business for around 27 years. Its reputation is backed by hundreds of positive reviews on customer review websites.

It 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 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 Merrimack?

Pricing information is not available on Andersen’s website since the cost of window installment differs based on how many and what type(s) of windows you need. However, based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. You can inquire about a free quote on its website for more information about the cost.

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 provides the best window installation for businesses in Merrimack. Aeroseal has about 23 years of industry experience, and it currently serves 13 states and Washington D.C. Its reputation is backed by all the positive reviews from customers online.

It has established itself as a company that installs windows and doors at businesses across the Eastern U.S.

Energy Efficiency of Aeroseal Windows Windows

Aeroseal Windows is an Energy Star partner offering 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 Merrimack?

Prices are not available on Aeroseal’s website, as the cost of window replacement varies greatly based on how many and what type(s) of windows you need. However, it provides high-quality windows at a competitive price point. You can inquire about 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 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 provides the best warranty in Merrimack. 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 around 20 years.

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

Energy Efficiency of Universal Windows Direct Windows

Universal Windows Direct’s commitment to sustainability shows in its energy-efficient window offerings. 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 Merrimack?

Even though prices are not readily available on Universal’s website, installations typically range from $225 to $425 per window based on customer feedback. That makes Universal Windows Direct more of a budget-friendly option for window repair and replacements. Receiving a free quote on its website is the best way to know for sure.

Please note that the companies in this section are national, which means the quality of the service may depend on your local team. We have tried to remain unbiased and transparent by describing both pros and cons for every company.

More Window Companies in Merrimack

Renewal by Andersen of Boston

Northborough, MA
4.5
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • 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 Window Replacement
  • Service icon Fast Delivery
  • Service icon Sliding Glass
  • Service icon Double-Hung
  • Service icon Bay Windows
  • Service icon Commercial Windows
  • Service icon Stained Glass

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

Window World of New Hampshire

Manchester, NH
4.1
★★★★★
  • Pros icon Free assessment
  • Pros icon Timely Service
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

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

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

Dependable J M R Siding

Manchester, NH
4.3
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

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

Website: https://jmrsiding.com/
Address: 65 Pine Island Rd, Manchester, NH 03103
Phone: (603) 669-5020

Pella Windows & Doors of Bedford

Bedford, NH
4.2
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

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

Website: https://www.pellabranch.com/new-england/showrooms/bedford/
Address: 384 State Rte 101 Unit #2, Bedford, NH 03110
Phone: (603) 725-4670

Nashua Glass

Nashua, NH
4.2
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

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

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

Fiori Construction LLC

Londonderry, NH
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 Window Replacement
  • Service icon Residential Windows
  • Service icon Commercial Windows

Website: http://www.fioriconstructionllc.com/
Address: 26 Sparhawk Dr, Londonderry, NH 03053
Phone: (978) 265-6843

Granite State Glass

Hudson, NH
4.1
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

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

Website: http://www.granitestateglass.com/
Address: 121 Lowell Rd, Hudson, NH 03051
Phone: (603) 883-8545

A Plus Energy Services

Milford, NH
4.1
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

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

Website: https://aplusenergyservices.com/
Address: 113 Savage Rd, Milford, NH 03055
Phone: (603) 489-9269

Clear Choice Home Improvements

Manchester, NH
4.1
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Timely Service
  • Pros icon Price Transparency

Services Offered

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

Website: http://www.clearchoicehomeimprovement.com/
Address: 8025 S Willow St #107, Manchester, NH 03103
Phone: (603) 232-0237

Universal Windows Direct of Manchester

Manchester, NH
4.4
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Timely Service

Services Offered

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

Website: https://universalwindowsmanchester.com/
Address: 880 Candia Rd #8, Manchester, NH 03109
Phone: (603) 218-3756

PIC Home Pros

Londonderry, NH
3.9
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

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

Website: https://pichomepros.com/
Address: 51 Harvey Rd, Londonderry, NH 03053
Phone: (603) 505-8600

Rejean's Custom Quality Siding LLC

Manchester, NH
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

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

Website: https://nhwindowsiding.com/
Address: 74 Depot Rd, Manchester, NH 03103
Phone: (603) 668-7677

S R Windows & Doors Plus Inc

Amherst, NH
3.8
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

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

Website: http://www.srwdplus.com/
Address: 101 NH-101A, Amherst, NH 03031
Phone: (603) 880-8006

Queen City Glass & Mirror

Manchester, NH
3.8
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

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

Website: http://qcglass.com/
Address: 295 Elm St, Manchester, NH 03101
Phone: (603) 666-0302

Morgan Exteriors

Hooksett, NH
4.2
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Good Customer Service

Services Offered

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

Website: http://morganexteriorswindows.com/
Address: 78 Londonderry Turnpike UNIT E1, Hooksett, NH 03106
Phone: (603) 895-2092

C. Gosselin Siding & Windows

Manchester, NH
3.8
★★★★★
  • Pros icon Price Transparency

Services Offered

  • Service icon Residential Windows
  • Service icon Window Replacement
  • Service icon Fast Delivery
  • Service icon Window Repair
  • Service icon Custom Window Designs
  • Service icon Sliding Glass

Website: http://cgosselinsiding.com/
Address: 44 Cricket Ln, Manchester, NH 03104
Phone: (603) 626-0277

Manny's Roofing

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

Services Offered

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

Website: http://www.mannysroofing.com/
Address: 1197 Bridge St, Pelham, NH 03076
Phone: (603) 800-7663

DaBella

Salem, NH
4.3
★★★★★
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment

Services Offered

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

Website: https://dabella.us/location/salem/
Address: 13 Red Roof Ln Suite 201, Salem, NH 03079
Phone: (603) 691-2339

Quantum Remodeling LLC

New Boston, NH
4.1
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

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

Website: http://www.quantumremodeling.com/
Address: 264 Tucker Mill Rd, New Boston, NH 03070
Phone: (603) 566-4173

Dracut Window & Door

Dracut, MA
4.1
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

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

Website: http://dracutwindowanddoor.com/
Address: 16 Holbrook Ave, Dracut, MA 01826
Phone: (978) 751-3667
Merrimack Window Cost Calculator

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

There are quite a few perks of upgrading to energy-efficient windows. Some reasons you may want to consider making the change are the following:

  • Better temperature control in your home: When you live in a city like Merrimack where the winters can be cold, you usually need to rely on your heater to keep your home warm. Energy-efficient windows can cut back on the amount of heat lost through your windows when heating your home.
  • Protect your investment: If you have an older home, your windows are most likely in need of replacement. Updating your windows can make your home more comfortable and also help increase the value of your property if you decide to sell.
  • Save money on electricity bills: Because energy-efficient windows reduce the amount of energy used to heat or cool your home, the switch can help you save around $463 annually on your energy bills in Merrimack.
  • Protect your valuables from fading: When you switch to energy-efficient windows that have low-emissivity coatings, your floors, carpets and furniture will fade less because of their ability to filter out harmful UV rays.

Estimated Cost of Window Replacement in Merrimack

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

How Much Do New Windows Cost?

On average, Merrimack homeowners can expect their window replacements to range from $250 to $1,200. The average cost sits at around $600. But prices differ considerably based on the size of your home, complexity of the installation, your location and the quality of the company you choose. Many window installers also provide door installations, which will make your project cost more.

With windows, efficiency is the most important factor for many homeowners. Efficient windows may cost more off the bat, but by increasing the efficiency of your home — especially during the winter — they can give you many years of energy savings. According to Energy Star, buying certified energy-efficient windows can save Merrimack homeowners $463+ a year after replacing single-pane windows.

We recommend requesting free quotes from several window installation companies to find the right windows and the company that works best for your budget.

What Services do Window Installers Offer?

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

Full-frame installations are usually recommended when you want a new style or your window has a lot of deterioration. With this service, your professionals will replace the complete window, including the trim, sill and frame. A pocket installation involves installing a new window within the old frame. So, instead of tearing out the whole window and reinstalling it, the window installer will just slide the replacement window (also called a retrofit or insert window) into the frame.

If you're still debating which kind of installation you need, you can talk to your provider and get their recommendation. The choice mostly depends on how old the frames are and if there's any damage.

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 Merrimack

The EcoWatch Reviews team is different from most reviewers since we examine these companies through a sustainability lens. We have reviewed the top window replacement companies in Merrimack mostly based on energy efficiency, as it's the most sustainable option and the best one for homeowners. Energy-efficient windows have been shown to cut your electricity bills by hundreds of dollars. Along with energy efficiency, our rating methodology is based on the following factors:

Service Area

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

Work Quality

We're willing to bet that you're looking for professionals who do a great job installing windows. We've vetted each installer featured in our guide to make sure its technicians are well-qualified and that the company has gotten plenty of positive customer feedback to vouch for its service.

Customer Reviews

We analyzed trends in recent online reviews to determine the companies with the highest rates of customer satisfaction. Customer satisfaction may be the factor we place the most value on, as it indicates the quality of services across most other categories, including professionalism, cost, quality of parts, warranty, quality of installation and more.

Cost

Cheaper windows don't necessarily mean better windows, but we know many of our readers would like to keep costs low when possible. When analyzing providers' prices, we awarded higher points to companies with reasonable prices and accessible financing rather than "cheaper" services.

Warranty

As discussed, windows are a considerable investment, so you'll want to make sure that investment is well protected. Window installation companies that have lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.

Years of Experience

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

Merrimack, NH Window Replacement FAQs

How much should window installation cost?

The typical cost to install a window can range from $450 to $650. There are a variety of factors that affect how much it costs, including your property's location, the materials used in designing the windows, the number of windows, how energy-efficient the windows are, styles and sizes of windows and local labor costs.

What are the most common kinds of replacement windows?

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

When do I have to use a window installation company?

You should hire a window installation company whenever you want new windows. Installing windows is a complex process that can take a lot of time, so it's best handled by the professionals.

When is the best time of year to replace windows?

Replacement windows can be installed during any season, but autumn might be best. No matter when you install them, the contractors will take steps to ensure that too much hot or cold air doesn't get into your home, so the temperature outside doesn't necessarily matter that much. What's most important is that the weather should be dry.

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