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Window Installation & Replacement in Suffolk County, NY

The exterior of your Suffolk County home is important to it’s curb appeal, but the inside is just as important. With great looking windows, you are able to enhance both the outside and inside feel of the home.

For residents currently living in Suffolk County, including Smithtown, Huntington, and Commack, and other areas in Long Island, allow Thermo-Seal Windows to take care of all your replacement windows needs. Our team has more than 30 years of experience and have numerous testimonials from satisfied customers. We can take care of all of your remodeling needs. Whether that it be windows, siding, or roofing, Thermo-Seal has your back – literally!

Window Installation

We have designed all of our windows to be easy to use, and more importantly, easy to maintain. Our products are of the finest quality on the market, and perform at a top notch level – we are very proud. We offer a variety of window styles to meet your unique needs and the specifications of your home. You can select from our most popluar styles or work with our team to create a custom window solution!

Window Styles

We work with the top manufacterers in the industry to offer you superior quaility. All of our windows can be designed to fit your space and are available in a variety of materials including vinyl, wood, and composite. Our most popular window styles are:

  • Sliders
  • Garden
  • Casement
  • Picture
  • Bay & Bow
  • Double Hung

Here’s where it gets great for you: when you have brand new windows, the value of your property increases, and when you have new windows from Thermo-Seal you actually save money on your energy bill!

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