30 Best Window Replacement Companies in Londonderry, NH (Feb 2023)
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How Installing Energy-Efficient Windows in Londonderry Saves You Money

When you upgrade to energy-efficient windows, you may see several perks, such as:

• Protect your valuables: The low-emissivity coatings on many energy-efficient windows help reduce damage from the sun's UV rays to your floors, carpets and furniture.
• Protect your investment: If your home is on the older side, your windows are most likely in need of replacement. Updating your windows can improve the insulation in your home and also help increase the value of your property if you decide to sell.
• Save on energy bills: Because energy-efficient windows decrease the amount of energy needed to heat or cool your home, the switch can help you save about $408 annually on your energy bills in Londonderry.
• Decrease your carbon footprint: You can reduce your carbon footprint by about 12% when you install Energy Star certified windows. In Londonderry, that's about 152 pounds per year on average.

Estimated Cost of Window Replacement in Londonderry

Windows come in all shapes and sizes, so costs and services will differ greatly. Here are the average costs and services that you can find from the average window installation company.

How Much Do New Windows Cost?

Though the typical of installing a single window is about $600, it can range from $200 to $1,200. But costs will vary significantly depending on the quality of your products, your location, the current condition of your home and the number of windows you need. Many window companies also offer door installations and other add-ons like baths, coating, shutters and more. These extra services will increase overall project costs.

Whether or not you opt for energy-efficient windows is another factor that will affect the cost. These will almost always cost more than other windows, but on the other hand, you can save about $408 a year on your energy bills in Londonderry.

Another factor that influences the overall cost is the material you pick 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?

The first step of an installation is to think about whether you should get a full-frame or pocket installation.

A full-frame installation replaces the total window, including the sill, frame, trim and the window panes. Because this kind of installation requires more time, it will cost more than a pocket installation. Pocket installations are simpler and won't carry as large a bill, as they involve simply replacing the window within its existing frame. But if the frame has any damage or deterioration, you may have to get a full-frame installation instead.

Your window installation company can help you decide which type of installation you need.

How We Choose the Best Window Installers in Londonderry

In our hunt to find the most reliable, eco-friendly window installers in Londonderry, the EcoWatch Reviews team chose the above companies as the best window installation companies in the city. Along with energy efficiency, we reviewed each installer and assigned rankings based on the following methodology:

Service Area

Because this is a guide for Londonderry, we gave more points to companies that provide services to the city. There are other reputable providers that didn't make our list because of the low odds that they would serve the average homeowner in Londonderry.

Work Quality

When picking new windows, the quality and range of services can often play just as important of a role in insulation and performance as the type of window you opt for. We do rate window installers higher if they offer high-quality products, but we also consider workmanship as reflected in customer feedback.

Customer Reviews

Customer feedback is another super important review factor. If most customers don't have good things to say about their experience with a certain company, it won't be featured on EcoWatch.

Cost

This one is a give-and-take: as with other services, cheap window companies may not provide the most quality service. Still, we want to ensure we're highlighting companies that provide a variety of price and financing options so they're accessible to most homeowners.

Warranty

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

Years of Experience

Lastly, we like to see companies that have been in the industry for a while. Window installers that have more years of experience will earn higher rankings by our standards. We like to see at least ten years of experience.