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The Premier Home Improvement Company Serving The Syosset, NY, Area

If you are searching for a skilled home improvement company in Syosset, New York, now is the time to turn to the professionals at Thermo-Seal Windows & Siding. Our impressive team has the experience needed to complete various types of projects. What’s more, when you partner with us, rest assured your home will be in the most capable hands. We are dedicated to providing flawless workmanship and source our products from industry-leading manufacturers.

What to Expect

We are a home improvement company that can install wood and composite decks, additions, and stonework. We also have the know-how needed to outfit your home with the following:

Replacement Windows

Our windows can be customized, so you can choose your preferred frame material, color, and style. These windows are also a smart choice as they are energy-efficient and can help lessen stress on your HVAC system and may help reduce your energy expenses.


We are a certified siding contractor for CertainTeed and James Hardie. These companies are known for producing eye-catching, hard-wearing, and energy-efficient siding that homeowners can rely on.


Our team installs attractive, secure, and durable entry, storm, and patio doors. Additionally, we offer custom sliding glass doors and French doors that are constructed by Harvey, our manufacturing partner.  


As a GAF Master Elite Certified contractor, we install first-rate asphalt shingle roofing. During your roof replacement, we can also install gutters and gutter systems.

Go With a Home Improvement Company You Can Trust

To learn more about the products and services we offer in Syosset, NY, contact Thermo-Seal Windows & Siding today. Our friendly and helpful team looks forward to working with you and answering any questions you may have.

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

We offer multiple locations to serve you throughout the Tri-State area including Rye, Westchester County, Melville, and Stamford.

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