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New Window Installation Katonah, NY

Thermo-Seal offers complete window replacement and new construction services. We are proud to provide top of the line windows from leading manufacturers. Our trained staff can guide you through the wide array of options available in window materials, styles, and energy efficiency to find the best match for your home and budget.

Window Replacement

Window replacement can dramatically change the look and feel of your home. Perhaps you have decided to add an addition to your living room or want to make your home more energy efficient. Either way, the windows you choose can have a big impact on the look, feel and functionality of your home. If you are starting on a project, give our highly trained contractors a call today to learn more about how we can help!

Window Installation

Looking for new window installation for a new construction project? We’ve been outfitting homes in New Canaan with quality windows for over three decades. We can help you select the window option that is the perfect fit for your specific needs. Quality windows are built to last for years, which is why we’re committed to providing only the highest end products. Call to learn more!

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.

456 Sunrise Highway
Rockville Center, NY 11570
(866) 281-4567
Melville Office
68 South Service Road
Melville, NY 11747
(866) 281-4567
Rye Corporate Office
411 Theodore Fremd Avenue
Rye, NY 10580
(914) 925-3443
Stamford Office
263 Tresser Blvd
Stamford, CT 06901
(203) 663-3534