21 Best Window Replacement Companies in Londonderry, NH (2023 Reviews)
Window Companies Near Me

Are you looking to upgrade your windows? Our list of the best window installation companies can help you narrow down which one to choose.

We analyzed all the top window installers in Londonderry and selected the top 21 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.

Whether you're doing renovations or have damaged windows, windows play a key role in conserving your home's electricity. The Department of Energy estimates that heat or cool air lost through old or damaged windows could make up about 30% of heating and cooling usage. In Londonderry, where the electric bills are an average of $35 per month, that's almost $$124 per year wasted.

Installing energy-efficient windows on your property can help you save money each month on your electric bills — and you can help the environment as well.

Efficient windows are especially important in Londonderry, where winters are long and cold. According to Energy Star, making the switch to energy-efficient windows can save the average homeowner up to $435 a year.

Best Affordability

Window World

★★★★★
4.5

  • Large serice area
  • 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
  • More expensive than competition

Best Warranty

Universal Windows Direct

★★★★★
4

  • Lifetime warranty
  • Manufactures products in-house
  • Makes charitable contributions
  • Some installations carried out by third-party contractors

Best Window Replacement Companies in Londonderry

The EcoWatch team examined dozens of installers in Londonderry to find the top ones for our readers. The installers in this article scored best in our categories, which include energy-efficient offerings, customer service, availability, price 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 Large serice area
  • 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. Window World has been in the window business for about 27 years. Many positive reviews on customer review websites back the provider's reputation.

Window World may be the company for you if you're interested in one that is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital.

Energy Efficiency of Window World Windows

Window World is an Energy Star partner and offers 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 Window World representative when inquiring about services.

How much does Window World cost in Londonderry?

Window World does not list prices on its website, but it's known for offering some of the most affordable window installations around. You can ask for 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 Member of US Green Building Council
  • Pros icon Manufactures products in-house
Cons:
  • Pros icon More expensive than competition

Renewal by Andersen has the best availability in Londonderry. This provider has 27 years of experience in the windows business, and it has proved to be one of the most reputable companies in the business. Its reputation is backed by many positive reviews on customer review websites.

It has established itself as a company that uses in-home estimates and advanced digital tools to help you plan and visualize your project before getting started.

Energy Efficiency of Renewal by Andersen Windows

Renewal by Andersen's commitment to sustainability can be seen in its 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 Londonderry?

Andersen doesn't have any prices available 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 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 Lifetime warranty
  • Pros icon Manufactures products in-house
  • Pros icon Makes charitable contributions
Cons:
  • Pros icon Some installations carried out by third-party contractors

Universal Windows Direct is 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 provider has many positive reviews from customers online.

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

Energy Efficiency of Universal Windows Direct Windows

Universal Windows Direct is an Energy Star partner with 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 ask your Universal representative when inquiring about services.

How much does Universal Windows Direct cost in Londonderry?

Though pricing is 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. Getting a free quote on its website is the best way to get more accurate information.

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. Aeroseal has been in the window installation business for about 23 years.

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' commitment to sustainability shows 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 Londonderry?

Aeroseal does not mention prices on its website, but it provides high-quality windows at a competitive price point. Getting a free quote on its website is the best way to get more accurate information.

We try to be unbiased and transparent by listing pros and cons for every company we review. Additionally, our rankings are not affected by any partnerships.

More Window Replacement Companies in Londonderry

Merrimack Valley Glass & Mirror

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

Services Offered

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

Website: https://www.merrimackvalleyglass.com/
Address: 5 Perry Way #7, Newburyport, MA 01950
Phone: (978) 463-9990

Nashua Glass

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

Services Offered

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

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 Timely Service
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Award-Winning

Services Offered

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

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 Educational Website
  • 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 Residential Windows
  • Service icon Double-Hung
  • Service icon Stained Glass
  • Service icon Fast Delivery
  • Service icon Commercial Windows

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

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 Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Award-Winning

Services Offered

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

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

Mr. Handyman of Lowell, Andover and Haverhill

Tyngsborough, MA
3.9
★★★★★
  • Pros icon Award-Winning
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Timely Service
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

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.mrhandyman.com/lowell-andover-haverhill/
Address: 30 Westech Dr, Tyngsborough, MA 01879
Phone: (978) 307-6905

M&M Skylights

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

Services Offered

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

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 Free assessment
  • Pros icon Educational Website
  • Pros icon Award-Winning
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

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

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 Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

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

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

R&M Glass

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

Services Offered

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

Website: http://www.buildwithglass.com/
Address: 120 Lumber Ln, Tewksbury, MA 01876
Phone: (781) 454-5611

Dependable J M R Siding

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

Services Offered

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

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

Portland Glass of Hooksett/Manchester

Hooksett, NH
3.9
★★★★★
  • 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 Custom Window Designs
  • Service icon Glass Showers
  • Service icon Commercial Windows
  • Service icon Residential Windows
  • Service icon Double-Hung

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

Minuteman Floors

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

Services Offered

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

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

Universal Windows Direct of Manchester

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

Services Offered

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

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

Solid State Construction

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

Services Offered

  • Service icon Commercial Windows
  • Service icon Fast Delivery
  • Service icon Custom Window Designs
  • Service icon Energy-Efficient Options
  • Service icon Residential Windows

Website: https://www.solidstateconstruction.com/
Address: 2 Shaker Rd d203, Shirley, MA 01464
Phone: (508) 715-3615

Elite Roofing and Siding Massachusetts

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

Services Offered

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

Website: https://www.choicerenovators.com/
Address: 240 Jackson St, Lowell, MA 01852
Phone: (978) 634-3831

Home Services at The Home Depot

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

Services Offered

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

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

Pane Free Glass

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

Services Offered

  • Service icon Custom Window Designs
  • Service icon Glass Showers
  • Service icon Residential Windows
  • Service icon Fast Delivery
  • Service icon Sliding Glass
  • Service icon Full-Service Installations
  • 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 Price Transparency
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Free assessment

Services Offered

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

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

Guaranteed Aluminum & Vinyl Inc

Lowell, MA
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

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

Website: https://lowell-window-replacement-glass-repair.com/
Address: 349 Bridge St, Lowell, MA 01850
Phone: (978) 452-2392

How Installing Energy-Efficient Windows in Londonderry Saves You Money

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

  • Reduce your carbon footprint: In Londonderry, you can cut your indirect greenhouse gas emissions by about 152 pounds per year after you upgrade to energy-efficient windows.
  • Save money on power bills: The Department of Energy estimates that heat gained or lost via windows accounts for about 25-30% of household energy use. Upgrading to energy-efficient windows can help lower that number, which helps you save $435 a year on your bills.
  • Protect your valuables from fading: The low-emissivity coatings on many energy-efficient windows filter out damaging UV rays, preventing your furniture, carpet and other valuables from fading.
  • 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. Upgrading your windows could help raise the value of your property if you decide to sell.

Estimated Cost of Window Replacement in Londonderry

Windows come in different styles, shapes and purposes, so costs and services will differ remarkably depending on your project. Below, we detail the typical cost and services that you can get from window installers.

How Much Do New Windows Cost?

Typically, Londonderry homeowners can anticipate their window replacements to range from $250 to $1,200. The most common installations sit at around $600. How much it will cost you varies depending on several factors, including material, size, the location of your home, number of windows, type and more.

With windows, efficiency is one of the most important factors for most homeowners. Efficient windows may cost more initially, but by increasing the efficiency of your home — especially during the winter — they can provide decades of energy savings. According to Energy Star, buying certified energy-efficient windows can save Londonderry homeowners $435+ a year after replacing single-pane windows.

Another factor that affects the total cost is the material you choose for your frame. Aluminum frames are usually the least pricey and are sturdy and relatively maintenance-free, but they provide poor insulation. On the other hand, wood frames cost the most, as they are aesthetically pleasing and provide decent insulation. Fiberglass and vinyl frames provide good insulation and cost somewhere between the other two.

What Services do Window Installers Offer?

There are typically two types of window replacement services: full-frame and pocket installations.

A full-frame installation replaces the entire window, such as the sill, frame, trim and the window panes. As this kind of installation requires more time, it will be more expensive than a pocket installation. Pocket installations (or retrofits) entail replacing a window within its existing frame, which makes pocket installations more simple and affordable. But, if the frame has any rot or deterioration, you will most likely need a full-frame installation instead.

Your window installation company can advise you on the best type for your project. In Londonderry, the decision will mostly depend on the efficiency of your home and how old your existing frames are.

Best Affordability

Window World

★★★★★
4.5

  • Large serice area
  • 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
  • More expensive than competition

Best Warranty

Universal Windows Direct

★★★★★
4

  • Lifetime warranty
  • Manufactures products in-house
  • Makes charitable contributions
  • Some installations carried out by third-party contractors

How We Choose the Best Window Installers in Londonderry

EcoWatch is different from other reviewers since we assess these companies through a sustainability lens. Along with energy efficiency, we reviewed several window installers in Londonderry and ranked them using the following methodology:

Service Area

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

Work Quality

When it comes to new windows, the quality and range of services often plays just as important of a role in overall efficiency and performance as the brand you opt for. 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 patterns in recent customer feedback to determine the companies with the highest rates of customer satisfaction, weighted by sample size. Customer satisfaction might be the most important factor, as it reflects the quality of services across nearly every category, including cost, quality of parts, warranty, professionalism, 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 as low as possible. When analyzing the prices of providers, we awarded higher points to companies with reasonable prices and accessible financing rather than "cheaper" services.

Warranty

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

Years of Experience

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

Londonderry, NH Window Replacement FAQs

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

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

What are the most common types of replacement windows?

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

When do I need to use a window installation company?

Unless you have home repair skills and have the tools needed to replace your own windows, we recommend hiring the pros. The process of installing windows is complicated and can take anywhere from four to six hours for a single window. Although it's tempting to try to save money by doing it yourself, hiring a company is a faster, more efficient and much safer option.

When is the best time of year to replace windows?

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

Should I replace my windows all at the same time?

If your windows are more than 20 years old, you probably need to replace all of them. At that point, they are usually less efficient, leakier and/or more damaged than new windows. Doing your windows all at the same time will involve less paperwork and less stress.

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