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Don’t Miss Out on Top-Quality Replacement Windows for Your Westport, CT, Home

Enhance your Westport, Connecticut, home’s beauty, energy efficiency, and functionality with new replacement windows from a trusted Andersen-certified contractor. At Thermo-Seal Windows and Siding, we specialize in custom windows that elevate your home’s curb appeal while improving insulation and reducing energy costs.

A better home is possible when you trust a company with decades of combined experience in window replacement. Thermo-Seal’s team of experts will gladly work with you to provide a home improvement experience that will have you return to us for anything you need.

Why Choose Thermo-Seal? It’s Simple.

Since 1985, Thermo-Seal has been the go-to expert for window installation across the community. We proudly offer Andersen and Harvey windows, with a strong emphasis on Andersen’s industry-leading products. As an Andersen-certified contractor, our team ensures precise installation for long-lasting performance and efficiency.

Our window installers bring decades of experience, combining technical expertise with an eye for design, to help you select home windows that enhance aesthetics and energy efficiency.

A Wide Selection of Energy-Efficient Windows

Choosing energy-efficient windows can help lower utility costs by sealing out drafts and improving insulation. We offer various window styles, including:

  • Double-hung: Classic and versatile for any home style.
  • Casement: Hinged design for easy ventilation and a sleek look.
  • Bay and bow: Expand your view with stylish, space-enhancing options.
  • Picture: Fixed, large glass panels for maximum light.
  • Storm impact and acoustic: Enhanced protection and sound insulation.

Our home windows suit various architectural styles and preferences and are available in vinyl, wood, and composite materials.

Custom Windows Designed for Your Home

At Thermo-Seal, we understand that every home is unique. That’s why we offer custom windows tailored to your specifications. Whether you need replacement windows or new construction installations, we provide top-tier solutions backed by expert craftsmanship.

Are you ready to upgrade to new windows? Contact Thermo-Seal today for a free consultation on your window replacement needs in Westport, CT!

We make clients happy.

We Make it Easy

With customer service and craftsmanship that’s second-to-none, we make it easy
to achieve the home of your dreams.
Free, No Hassle Estimates Schedule a free in-home or virtual estimate. We’re here to help!
High Quality Products We offer the best products available, including our own brand of replacement windows.
Satisfaction Guarantee Our job is not done until you’re completely satisfied.

We've got connections.

We're certified by the industry’s leading manufacturers to offer a wide range of top quality options. View Our Credentials

Thermo-Seal Windows Siding & Roofing, Inc. is an A+ Rated BBB Accredited Business serving Westchester County, Rockland County, Nassau County, Suffolk County and Fairfield County. We offer multiple locations throughout the Tri-State Area to better serve our customers.

Showroom
456 Sunrise Highway
Rockville Center, NY 11570
(516) 917-0598
Melville Office
68 South Service Road
Melville, NY 11747
(631) 710-6937
Rye Corporate Office
411 Theodore Fremd Avenue
Rye, NY 10580
(914) 635-3748
Stamford Office
263 Tresser Blvd
Stamford, CT 06901
(203) 990-1812