Skip to main content

Beautiful, Affordable, and Durable Vinyl Windows for Homes Across the Tri-State Area

It's no surprise that if you’re in search of the Tri-State Area’s premier selection of vinyl windows and installation services, you’ve struck gold! Why bother with any other window contractor when Thermo-Seal Windows and Siding has been the trusted choice for Tri-State residents for over three decades.

Since 1985, we’ve worked tirelessly to develop one of the finest reputations in the community for quality service, an unmatched selection of windows, and window installation work that goes above and beyond. Are you ready to see what we can do for you?

Replacement Vinyl Windows with Style and Standards

Thermo-Seal is the area’s trusted window company with some of the finest replacement vinyl windows. That’s because of who we have chosen to work with to deliver on that promise.

Thermo-Seal proudly offers a custom line of windows crafted and manufactured by Harvey, a renowned brand in replacement windows. With Harvey's Thermo-Seal windows, you're not just getting windows; you're getting a shield against Mother Nature's might.

On top of that, our line of windows allows for some of the best windows you can buy for energy efficiency. After only a few months of installing our windows, you’ll notice a difference in your power bill.

But with our line of windows, you also get many choices that can work for any existing architecture in your home. From bay and bow windows to single-hung or double-hung, we live to give you the windows that will make your home stand out.

The Premium Choice in Window Installation

Thermo-Seal also offers premium installation services to ensure your windows are correctly installed and require minimal future maintenance. You can trust a Thermo-Seal installation for years!

It’s Time to Make the Call

Thermo-Seal Windows and Siding of the Tri-State Area is ready to supply you with the vinyl windows of your dreams. With high standards of energy efficiency and incredible style, you’ll be the envy of your neighborhood! Contact us today to get started.

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