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Quality Composite Windows to Upgrade Your Home in the Tri-State Area

You’ve got plenty of choices for new windows across the Tri-State Area, but why settle for less when you can choose the finest composite windows from a trusted group of home improvement experts?Thermo-Seal Windows and Siding is here to provide window services that will make any other window contractor look like an amateur. Our work as a window company has a sterling reputation backed by decades of experience and an A+ with the Better Business Bureau. Are you ready to experience the Thermo-Seal difference?

Choose Composite for a Premium Choice

If it’s time to invest significantly in your home, composite replacement windows can be a wise choice. Why? Thermo-Seal’s composite windows are superior in durability, energy efficiency, and low maintenance. Harvey, a leader in window engineering, manufactures our line of custom windows. These windows provide excellent insulation that can reduce energy bills over the first few months of use. Imagine paying for your windows from the cost savings they generate!Of course, it’s not just about features. With their attractive aesthetics and long lifespan, composite windows enhance your home's value and comfort, making them an innovative and cost-effective choice in window replacement.

Thermo-Seal’s Window Installation Services

New composite windows mean nothing if you don’t have the expertise of a company like ours to install them. Our experience in the market allows us to know exactly how to install your new windows with an eye toward performance and durability. When we’re done installing your new windows, you’ll wonder why you ever took so long to call us!

Themo-Seal Makes it Easy!

At Thermo-Seal Windows and Siding, customer satisfaction is critical. When you’re in the market for composite windows that deliver style and functionality, we have what it takes to handle your business. Contact us now 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