About Thermo-Seal: Long Island’s Trusted Exterior Remodeling Experts
Whether you’re replacing a front door, upgrading your patio access, or reinforcing your home with storm protection, Thermo-Seal offers expertly crafted doors that enhance security, energy efficiency, and curb appeal. Available in a wide range of materials, colors, and finishes, our doors are tailored to fit your style and budget—while standing up to Long Island’s coastal conditions.
Schedule Your Free In-Home Consultation
Premium Products for Your Long Island Exterior Remodeling Project
At Thermo-Seal, we believe your home deserves the best in both quality and performance. That’s why we partner with the industry’s top exterior remodeling brands to deliver long-lasting results you can trust. From energy-efficient window replacements to durable roofing and siding solutions, we offer only the finest materials for your home improvement project.
Our window selection includes trusted names like Andersen, Pella, and Harvey, known for their high-performance, energy-saving designs. For entry and patio doors, we install top-rated products from Therma-Tru, offering both style and strength.
When it comes to siding installation, we provide expert craftsmanship using James Hardie fiber cement siding and premium vinyl siding from CertainTeed and Westlake Royal. For roofing, we offer GAF asphalt shingles and custom metal roofing systems, built to protect your home for decades.
No matter the scope of your exterior remodel on Long Island, Thermo-Seal ensures superior materials, expert installation, and lasting value.
Frequently Asked Questions
Enhance your home’s security and curb appeal with Thermo-Seal’s expertly crafted entry doors. Wondering if it’s time for an upgrade? Explore our Entry Door Replacement FAQ for comprehensive insights into signs, suitable options, and the energy-efficient benefits of our replacements.
Can Thermo-Seal help with siding replacement?
Absolutely. We specialize in vinyl and insulated siding that boosts home value, improves energy efficiency, and provides long-lasting protection against Long Island’s weather.
Is financing available for home improvement projects?
Yes, Thermo-Seal offers flexible financing options to fit your budget, subject to credit approval. Ask about current promotions and low monthly payment plans.
How can I get a free estimate?
You can request a free, no-obligation estimate by calling us directly or filling out our quick online form. A Thermo-Seal specialist will contact you to schedule a convenient time.
What types of doors does Thermo-Seal install?
We install entry doors, patio doors, sliding glass doors, French doors, and storm doors from top-rated manufacturers. All doors are designed for durability, security, and curb appeal
Why Homeowners Choose Thermo-Seal
- Over 35 years of installation expertise
- ENERGY STAR® rated materials
- Custom sizing and finishes
- Professional, mess-free installation
- Trusted across Suffolk & Nassau Counties
What Our Clients Are Saying
We strive to make the entire home remodeling experience positive for our customers—from your first phone call, until the final handshake.
“I had a very good experience with Thermo-Seal. Chose them after interviewing many others because they’re local, communicated efficiently, and offered good midrange pricing and lifetime warranty. The crew did a fantastic job with the installation. They came early and finished 5 windows in 5 hours, and then they cleaned up. Highly recommended!”
Patrick B.
“We just completed a window and siding job for our home with Thermo-Seal. We are very impressed and satisfied with the quality of their products as well as the installation. I would recommend this company & I would use them again in the future if needed.”
Mindy L.
“The crew was a pleasure to work with, and we love our new windows. The installation was efficient, and the team was very professional. I’ve seen a difference in my heating bill since the install, which was our primary goal so we are very happy so far! I will work with Thermo-Seal again for a front door replacement when the time comes.”
Bonnie K.
“We hired Thermo-Seal for new windows and siding and I could not be happier! Their team is on time, professional, and meticulous about their work. You can tell they take pride in their output and ensure things are done correctly the first time around. The project completed ahead of schedule and we were kept in the loop the entire time. Very happy with their work and highly recommended!”
Sarah C.
“We were referred to Thermo-Seal by a neighbor who was very pleased with the results. We replaced seven windows and a sliding patio door are thrilled with the results and how much they enhance the appearance of our home. Without hesitation, we recommend Thermo-Seal for your home improvement projects.”
Frank D.
“Cannot believe how stress-free an experience it was dealing with Aaron and his team. Aaron was very patient with our multiple questions and never any sales pressure. The installation was clean, quiet and the installation team friendly and helpful. The windows were installed a few weeks before they were promised and there were no surprises. We will be strongly recommending Thermo-Seal to friends looking for replacement windows.”
David B.
