23 Best Window Replacement Companies in Gilmanton, NH (2023 Reviews)
Window Companies Near Me

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

We analyzed all the top window installers in Gilmanton 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 May 04, 2023

Why you can trust EcoWatch

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

Although green energy sources like wind and solar are important when it comes to lowering your carbon footprint, improving your home's energy efficiency can also have a considerable impact on home energy conservation. Damaged or outdated windows can cost you in energy bills. In fact, the Department of Energy estimates that 25-30% of your house's heat or cool air could be lost through your windows.

Replacement windows improve the insulation in your home, not only making you and your family more comfortable during the summer and winter, but also saving you some money and helping the environment.

We've put together this guide on the best installation companies to help you in your search, so you can not only take advantage of brand new windows, but also save money on your power bills.

Best Affordability

Window World

★★★★★
4.5

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

Best Overall

Renewal by Andersen

★★★★★
4.5

  • Great industry reputation
  • Member of US Green Building Council
  • Manufactures products in-house
  • No lifetime warranty

Best for Businesses

Aeroseal Windows

★★★★★
4

  • Great industry reputation
  • Custom Designs
  • Manufactures products in-house
  • No lifetime warranty

Best Window Replacement Companies in Gilmanton

The EcoWatch team assessed dozens of window installation companies across Gilmanton to narrow our list down to the top ones. The providers in this article passed our review standards for energy-efficient offerings as well as customer service, price, local expertise and beyond.

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 EnergyStar Partner
  • 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. This window installation company has been in business since 1995 and currently services 200 locations nationwide.

You may want to consider picking 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

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 Gilmanton?

Window World does not list prices on its website, but it's known for offering some of the most affordable window installations around. The best way to get more accurate pricing information is to receive a free quote from the company.

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 Member of US Green Building Council
  • Pros icon Manufactures products in-house
Cons:
  • Pros icon No lifetime warranty

Renewal by Andersen provides the best availability in Gilmanton. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. This company has 27 years of experience in the window installation industry, and it has established itself as one of the most respected companies in Gilmanton. Its reputation is backed by a considerable amount of positive reviews on customer 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 company for you.

Energy Efficiency of Renewal by Andersen Windows

Renewal by Andersen appeals to eco-conscious consumers by providing energy-efficient window offerings. 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 Gilmanton?

Andersen doesn't have any cost information 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. If you'd like more accurate information, you can receive 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 Great industry reputation
  • Pros icon Custom Designs
  • Pros icon Manufactures products in-house
Cons:
  • Pros icon No lifetime warranty

Aeroseal Windows provides the best window installation for businesses in Gilmanton. It's 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 company has been in business since 1999 and currently services 13 states and Washington D.C. The provider has hundreds of glowing reviews from customers online.

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

Energy Efficiency of Aeroseal Windows Windows

Aeroseal Windows' commitment to sustainability can be seen in its energy-efficient window offerings. 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 Gilmanton?

Prices aren't displayed on Aeroseal's website, but it provides high-quality windows at a competitive price point. If you'd like to know for sure, you can get a quote on the company's website.

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 is a company that has grown immensely since its inception in 2002, and now has several franchise dealers nationwide. Universal has about 20 years of experience in the window replacement sector. Its reputation is backed by a considerable amount of positive reviews from customers online.

You may want to consider opting for Universal if you're interested in a company that has an industry-leading warranty covering products, parts and workmanship for life.

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 Gilmanton?

Universal does not detail prices on its website, but installations typically range from $225 to $425 per window based on customer feedback. That makes Universal Windows Direct more of a budget-friendly option for window repair and replacements. If you'd like to know for sure, you can receive a quote on the company's website.

We've recommended installers with shining reputations, but keep in mind these are national companies, so your service may vary depending on your local crew. We have tried to be unbiased and transparent by listing pros and cons for every company we reviewed.

More Window Replacement Companies in Gilmanton

Nashua Glass

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

Services Offered

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

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

Clear Choice Home Improvements

Manchester, NH
4.0
★★★★★
  • Pros icon Price Transparency
  • Pros icon Timely Service
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Award-Winning

Services Offered

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

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

Marquis Roofing

Manchester, NH
4.0
★★★★★
  • Pros icon Award-Winning
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Timely Service

Services Offered

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

Website: https://marquisroofing.com/
Address: 106 W River Dr Ste 4, Manchester, NH 03104
Phone: (603) 825-4140

Accurate Glass Crafters LLC.

Haverhill, MA
4.0
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Double-Hung
  • Service icon Tempered Glass
  • Service icon Stained Glass
  • Service icon Full-Service Installations
  • Service icon Residential Windows
  • Service icon Commercial Windows
  • Service icon Sliding Glass
  • Service icon Glass Showers
  • Service icon Custom Window Designs
  • Service icon Fast Delivery

Website: http://accurateglasscrafters.com/
Address: 96 River St, Haverhill, MA 01832
Phone: (978) 809-8179

Window World of New Hampshire

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

Services Offered

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

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

Budget Blinds of the Seacoast

Portsmouth, NH
3.9
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Good Customer Service

Services Offered

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

Website: http://www.budgetblinds.com/the-seacoast-nh
Address: 105 Bartlett St # 4, Portsmouth, NH 03801
Phone: (603) 431-3888

M&M Skylights

Brentwood, NH
3.9
★★★★★
  • Pros icon Timely Service
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

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

Website: https://skylightspecialist.com/m-and-m-skylights
Address: 183 NH-125 Unit 13, Brentwood, NH 03833
Phone: (978) 945-9412

The Window Source NH

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

Services Offered

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

Website: https://www.windowsourcenh.com/
Address: 779 Lafayette Rd Suite 1, Seabrook, NH 03874
Phone: (844) 423-3023

Northfield Handyman Services

Haverhill, MA
3.9
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

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

Website: https://www.northfieldhandyman.com/
Address: 57 Stage St, Haverhill, MA 01830
Phone: (978) 685-0568

Dependable J M R Siding

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

Services Offered

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

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

Glass Unlimited

Wells, ME
3.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Timely Service
  • Pros icon Free assessment

Services Offered

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

Website: https://www.glassunlimitedme.com/
Address: 1213 Post Rd, Wells, ME 04090
Phone: (207) 646-8268

Portland Glass of Hooksett/Manchester

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

Services Offered

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

Website: https://www.portlandglass.com/hooksett/
Address: 1118 Hooksett Rd, Hooksett, NH 03106
Phone: (603) 945-2642

Portland Glass of Springvale & Sanford

Springvale, ME
3.9
★★★★★
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Good Customer Service

Services Offered

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

Website: https://www.portlandglass.com/springvale/
Address: 645 Main St, Springvale, ME 04083
Phone: (207) 405-0449

Pella Windows & Doors of Newington

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

Services Offered

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

Website: https://www.pellabranch.com/new-england/showrooms/newington/
Address: 25 Fox Run Rd Suite 2, Newington, NH 03801
Phone: (603) 725-4690

Minuteman Floors

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

Services Offered

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

Website: https://www.minutemanfloors.com/
Address: 66 Hanover St #200, Manchester, NH 03101
Phone: (866) 248-2312

Home Services at The Home Depot

Somersworth, NH
3.8
★★★★★
  • 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 Bay Windows
  • Service icon Glass Showers
  • Service icon Fast Delivery
  • Service icon Aluminum Window Frames
  • Service icon Commercial Windows
  • Service icon Custom Window Designs
  • Service icon Residential Windows

Website: https://www.homedepot.com/l/Somersworth/NH/Somersworth/03878/8931/services
Address: 12 Commercial Dr, Somersworth, NH 03878
Phone: (855) 731-4536

Home Services at The Home Depot

Tilton, NH
3.8
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

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

Website: https://www.homedepot.com/l/Tilton/NH/Tilton/03276/3402/services
Address: 160 Laconia Rd, Tilton, NH 03276
Phone: (877) 625-2909

Universal Windows Direct of Manchester

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

Services Offered

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

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

Home Services at The Home Depot

Methuen, MA
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

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

Website: https://www.homedepot.com/l/Methuen/MA/Methuen/01844/2685/services
Address: 72 Pleasant Valley St, Methuen, MA 01844
Phone: (978) 216-9836

Home Services at The Home Depot

Claremont, NH
3.8
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

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

Website: https://www.homedepot.com/l/Claremont/NH/Claremont/03743/3408/services
Address: 451 Washington St, Claremont, NH 03743
Phone: (844) 642-5037

Pane Free Glass

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

Services Offered

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

Website: http://panefreeglass.com/
Address: 270 Amory St #17, Manchester, NH 03102
Phone: (603) 497-1830

Corporate Office for Pella of Boston

Haverhill, MA
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

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

Website: https://www.pellabranch.com/boston/
Address: 45 Fondi Rd, Haverhill, MA 01832
Phone: (978) 373-2500

Stone Coast Remodeling

Standish, ME
3.8
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

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

Website: http://stonecoasthandyman.com/
Address: 12 Whitney Pines Dr, Standish, ME 04084
Phone: (207) 991-4357

How Installing Energy-Efficient Windows in Gilmanton Saves You Money

When you switch to energy-efficient windows, you may see some perks, including:

  • Save money on energy bills: Installing energy-efficient windows reduces your energy bills by about 12% because you use less energy.
  • Decrease your carbon footprint: Because energy-efficient windows improve the insulation in your home, you can reduce your carbon footprint by about 12%, according to Energy Star.
  • Protect your investment: The older your home is, the more likely it is that getting new windows will benefit you. Older homes tend to have windows that are outdated, leaky or potentially even damaged in some way. Upgrading your windows could help raise the value of your home if you decide to sell.
  • Protect your valuables: The low-emissivity coatings on many Energy Star certified windows help prevent the fading of your floors, carpets and furniture by filtering out UV rays.

Estimated Cost of Window Replacement in Gilmanton

Let's go over the cost of window installation and the kinds of services you may need for your home.

How Much Do New Windows Cost?

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

Keep in mind that energy-efficient windows may come at a higher price point, but Energy Star estimates the upgrade will save you between $101 and $583 per year when replacing single-pane windows and between $27 and $197 per year when replacing double-pane, clear glass windows. Your savings will vary depending on your local climate, energy rates and individual home characteristics.

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

What Services do Window Installers Offer?

There are generally two kinds of window installation services: full-frame and pocket installations.

A full-frame installation is a replacement of the total window. This service involves taking out the old window, the windowsill, and the exterior and interior trim. It also involves other materials, including insulation and drip edges, which increase the overall cost of the project. It's also worth noting that it's not uncommon for homeowners to have to touch up the paint around the window after a full-frame installation. Pocket installations (or retrofits) entail installing a new window within its existing frame, which makes pocket installations take less time and therefore cost less. But, if the frame has any damage or rot, you should opt for a full-frame installation instead.

Your window installation company should be able to help you choose which type of installation you need.

Best Affordability

Window World

★★★★★
4.5

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

Best Overall

Renewal by Andersen

★★★★★
4.5

  • Great industry reputation
  • Member of US Green Building Council
  • Manufactures products in-house
  • No lifetime warranty

Best for Businesses

Aeroseal Windows

★★★★★
4

  • Great industry reputation
  • Custom Designs
  • Manufactures products in-house
  • No lifetime warranty

How We Choose the Best Window Installers in Gilmanton

In our search to find the most reliable, eco-friendly window installers in Gilmanton, the EcoWatch team examined dozens of companies before settling on these. Along with energy efficiency, we evaluated several window installers in Gilmanton and ranked them using the following methodology:

Service Area

This one is self-explanatory, but we've chosen to highlight window installation companies that serve Gilmanton 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 brand you get. We do give window installers more points if they offer high-quality products, but we also factor in workmanship as reflected in customer feedback.

Customer Reviews

We analyzed trends in recent customer feedback to find the companies with the most consistent customer satisfaction, weighted by sample size. Customer satisfaction might be the factor we place the most value on, as it reflects the quality of services across nearly every category, including warranty, quality of parts, quality of installation, cost, 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 awarded higher scores to companies with reasonable prices and accessible financing rather than "cheaper" services.

Warranty

As discussed, windows are a substantial investment, so you'll want to make sure that investment is protected. Window installation companies that give you lengthy warranties for products, parts and labor rank higher with EcoWatch.

Years of Experience

Lastly, 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.

Gilmanton, NH Window Replacement FAQs

What is the average cost to install windows?

The national average cost of installing a window is around $600 but can range from $200 to $1,200, depending on a variety of factors. The price is typically dependent on the size of the window, the location of your property and the type and material of the window. 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 do not open are more efficient than windows that do. To be sure you're getting 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 services do window installation companies offer?

Window installation professionals cover the entire process — from replacing old windows with new ones to cleaning up afterward. In addition, a lot of companies offer window manufacturing, customization and repairs.

How often should you replace your windows?

Windows generally have a lifespan of around 20 to 30 years, but anytime you notice damage on your windows, it's a good idea to have them looked at by an expert to determine if they are in need of a repair or replacement.

Should I replace all my windows at the same time?

If your windows are greater than 20 years old, you most likely need to replace all of them. By that point, they are typically less efficient, draftier and/or more damaged than new windows. Replacing your windows all at the same time will involve less paperwork and less stress.

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