Window Replacement & Installation in Rochester, Dover & Portsmouth, NH

Energy-efficient windows designed to keep your home comfortable and reduce monthly energy bills.

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Window Replacement in Rochester, Dover & Portsmouth, NH

At Distinctive Siding & Window, we’ve been helping homeowners and businesses in Rochester, Dover, and Portsmouth, NH upgrade their properties with energy-efficient window replacements for over 25 years. If your old windows are drafty, fogged, or outdated, they could be costing you hundreds in higher energy bills every year. Our expert installers—never subcontractors—deliver the precision workmanship needed to protect your home and improve its curb appeal.

  • An empty room with a lot of windows and a view of the city.

  • A living room with lots of windows and a fireplace

  • A living room filled with furniture and a large window

  • A kitchen with two sinks and a lot of windows.

  • An empty room with a lot of windows and a balcony.

  • Two men are installing a window in a house.

Why Replace Your Windows?

New replacement windows not only enhance the look of your home or business, but they also:



  • Improve energy efficiency and help lower heating and cooling costs
  • Increase property value and curb appeal
  • Provide better security and noise reduction
  • Require less maintenance than outdated windows


Our detail-oriented team works with you to select the perfect style and fit so you can enjoy long-lasting results.

How Do Energy-Efficient Windows Work?

Energy-efficient windows are designed to keep your home comfortable in every season while reducing the strain on your heating and cooling system. They use several advanced features, including:

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Low-E Glass Coatings

A nearly invisible layer reflects heat back inside during the winter and blocks unwanted heat from the sun in the summer.

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Double or Triple Panes

Multiple layers of glass with insulating air or argon gas between them create a thermal barrier, preventing drafts and energy loss.

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Insulated Frames

High-quality vinyl or composite frames are engineered to reduce heat transfer compared to older wood or aluminum frames.

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Tight Seals

Professional installation ensures there are no gaps where air can escape, keeping your home airtight.

Together, these features help you maintain a consistent indoor temperature, lower energy bills, and enjoy a more comfortable living environment year-round.

Types of Windows We Install

We proudly install a wide variety of windows in Rochester, Dover, and Portsmouth, NH, including:



  • Double-hung windows – a classic, versatile choice for any home
  • Bay & bow windows – add natural light and extra space with an elegant design
  • Storm windows – improve insulation and protect against New England’s harsh weather
  • Egress windows – meet safety codes while adding functionality to your basement or living space
  • Custom windows – designed to fit your exact needs and home style
  • An empty room with a lot of windows and a balcony.

Trusted Window Brands

To ensure quality and durability, we install industry-leading brands such as:

These manufacturers are known for their superior materials and energy-efficient designs—perfect for withstanding New Hampshire’s weather.

  • Two men are installing a window in a house.

Why Choose Distinctive Siding & Window?

  • Over 25 years serving Rochester, Dover, Portsmouth, and surrounding NH communities
  • Owner-supervised installations—no subcontractors
  • Competitive pricing with a focus on quality workmanship
  • Full selection of siding, doors, gutters, and trim to complete your home’s exterior