Thermo-Seal Windows, Siding & Roofing, Inc.
Your Area's Premier Window Contractors
When you entrust your home to Thermo-Seal, you'll be able to rest easy knowing it's in the very best of hands.
At Thermo-Seal, We Make it Easy
Since 1985, Thermo-Seal has built a reputation in your area for excellence in the home remodeling industry. We strive to make the entire window replacement experience positive for our customers—from your first phone call to the final handshake. With each job we take on, we place a strong emphasis on:
- Trust - You won't have to worry about anything during your window replacement, because we will take care of it all. Unlike many other contractors, we do not subcontract services that we offer. There will only be our insured, well-trained team on your property, so you can rest assured your project is in good hands.
- Quality - We use only the highest quality window materials throughout the entire project, so you'll get the utmost long-term value for your investment.
- Satisfaction - We won't consider the job done until you're 100% satisfied. We maintain high-quality work, which keeps overhead costs low to save our customers money.
- Dependability - We have maintained a standard of excellence with our customers throughout our years of service. We pride ourselves on having an owner available to oversee every project.
Expect Quality Results With Thermo-Seal, An Industry Leader Providing Windows for Your Area Homeowners
When it comes to home improvement projects, there are certain qualities that are absolutely vital for success: attention to detail, pride in workmanship, reliable customer service, and commitment to excellence. You'll find an abundance of each when you choose Thermo-Seal, as well as:
- Industry-leading windows that are durable, energy-efficient, and customized to suit your home, taste, and budget
- Free, no-hassle, in-home or virtual estimates
- Expert installations performed by our own highly trained and insured technicians
- Strong warranties for your total peace of mind
- Special offers and financing to help make your dream windows a reality
- The personal touch and dedication to customer care you can only get from a company like ours who values quality and customer experience
For more information, and to get started on your project, contact Thermo-Seal today!
"At Thermo-Seal, we believe every home deserves windows that are energy-efficient, stylish, and built to last. Our expert installations combine premium brands with superior craftsmanship—delivering comfort, beauty, and long-term value."
Thermo-Seal Windows, Siding & Roofing, Inc.
A+ Rated Window Company Serving You Since 1985
Thermo-Seal has been providing high quality window replacement services to customers throughout the Tri-State area since 1985. The excellent craftsmanship and value of our windows are hard to beat. We’ll help you select the windows that are the right fit for your home, and then install them professionally for the peace of mind and energy savings you deserve.
Approach
At Thermo-Seal, we believe in a straightforward approach: integrating energy-efficient windows, top-tier materials, and skilled installation to provide enduring comfort, aesthetic appeal, and exceptional performance for every homeowner we assist.
Mission
Our mission is to deliver homeowners premium, energy-efficient windows that elevate curb appeal, enhance comfort, lower energy expenses, and guarantee enduring value supported by reliable craftsmanship.
Vision
We imagine homes throughout the Tri-State area featuring robust, elegant, and eco-friendly windows—enhancing living environments while establishing a benchmark for excellence in exterior remodeling solutions.
Your Questions, Answered
Frequently Asked Questions
How do I know when it's time to replace my windows?
Signs that you may need window installation or replacement include drafts, rising energy bills, difficulty opening or closing windows, visible damage, or condensation between panes. If your windows are 15–20 years old or older, they may also lack modern energy-efficiency features. During your consultation, Thermo-Seal will assess your current windows and help you determine the best solution based on performance, appearance, and cost.
What types of windows does Thermo-Seal install?
We install a wide variety of energy-efficient window styles, including double hung, casement, sliding, bay, bow, garden, and picture windows. Each style is available in materials like vinyl, wood, or composite to suit your home’s architectural needs and personal preferences. Whether you’re looking for better airflow, larger views, or a custom look, we’ll help you choose the right window styles for your space.
How long does a typical window installation take?
Most standard window installation projects can be completed in a single day, especially if you're replacing multiple windows of standard sizes. However, the timeline can vary depending on the number of windows, type, and any custom specifications. Thermo-Seal’s experienced, in-house crews work efficiently and cleanly, ensuring your project is completed with minimal disruption.
Do new windows really improve energy efficiency?
Absolutely. Modern energy-efficient windows significantly reduce heat transfer, helping your home stay warmer in the winter and cooler in the summer. Thermo-Seal installs windows from leading brands that feature insulated frames, Low-E glass, and advanced weatherstripping to minimize energy loss. This can lower utility bills while improving indoor comfort year-round.
Does Thermo-Seal use subcontractors for window installations?
No. At Thermo-Seal, all window installation and replacement work is performed by our full-time, in-house professionals. This ensures consistent quality, accountability, and expert craftsmanship on every project. With over 40 years of experience and thousands of satisfied customers, we pride ourselves on doing the job right—the first time.
Schedule an Appointment
Contact us through our contact form and we’ll get back to you as soon as we can.
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Our Edge.
Why Choose Thermo-Seal for Your Windows?
Rely on Thermo-Seal to provide a window that’s maintenance free, durable, airtight, and energy efficient. Contact us today for a custom window plan that will bring comfort, beauty, and satisfaction to your family year after year.
Professional Installation
When you hire us for your replacement windows you will be working with a professionally trained and well experienced company. Our installers are fully trained and insured.
Customer Care
Client satisfaction is our top priority. We ensure high-quality, accurate work. You'll never be disappointed! We are highly rated on home improvement review sites and appreciate all the positive feedback!
Andersen Certified Contractor
We have been vetted, trained, and backed by Andersen Windows & Doors, the industry's #1 most trusted and recommended brand of window and doors.
Experience the Thermo-Seal Difference
Reliable Exterior Remodeling in the Tri-State Area
Real Stories, Real Feedback
Our Client Reviews
Aaron and his team were fantastic! Our windows were ready 2 weeks earlier than expected and his team was always on time. They were pleasant to have around, were respectful of our space and cleaned up after themselves. We had a problem with rot in one of our walls and Aaron and his team helped us to fix it as part of the window installation, including finding a great electrician at the last minute. Thanks, Thermo-Seal! We're very pleased.
Rachel R.
I had a very good experience with Thermo Seal. Chose them after interviewing many others bc they're local, communicated efficiently and offered good midrange pricing + lifetime warranty. Aaron was great to work on setting up the contract and and then Fabio and his crew did a fantastic job with the installation. They came early, they finished 5 windows in 4-5 hours, they cleaned up. Fabio even helped me take care of another issue he found on the roof. Highly recommended.
Patryk B.
Thermo-Seal Windows, Siding and Roofing
456 Sunrise Highway
Rockville Center, NY 11570
Melville Office
68 South Service Rd.
Melville, NY 11747
(866) 994-5409
Rye Office
411 Theodore Fremd Ave, Rye, NY 10580
(914) 925-3443
Stamford Office
263 Tresser Blvd, Stamford, CT NY 06901
(203) 663-3534
Business Hours
- Mon - Fri
- -
- Sat - Sun
- Closed
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