Transform Your Home’s Exterior with Thermo-Seal
Looking for durable, low-maintenance siding in Suffolk or Nassau County? Thermo-Seal installs top-rated vinyl and composite siding that enhances the look, performance, and value of your home. Backed by over 35 years of experience, we help homeowners across Long Island protect their property from weather, moisture, and time—with styles and finishes that match every architectural aesthetic.
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Schedule Your Free In-Home Consultation
Why Choose Thermo-Seal Siding?
At Thermo-Seal we install only the highest quality siding products. We are proud to be a CertainTeed 5-Star Contractor. Our friendly team will help you select the right color and style to achieve the desired look for your home!
- Energy-Efficient Performance
Insulated panels reduce heat loss and help lower utility bills year-round. - Durable & Weather-Resistant
Engineered to withstand Long Island’s changing climate—resists rot, fading, and warping. - Virtually Maintenance-Free
No more scraping or repainting—just rinse and relax. - Stunning Color & Style Options
Choose from a wide range of profiles, textures, and finishes to match your vision. - Professional Installation
Every project is handled by certified siding experts using precision techniques.
FIBER CEMENT SIDING
VINYL SIDING
WOOD SIDING
FIBER CEMENT SIDING
Superior Strength & Style
Upgrade your home’s exterior with fiber cement siding from Thermo-Seal, the ideal blend of durability, beauty, and low maintenance. Crafted to mimic the look of wood, brick, or stucco, fiber cement offers long-lasting protection against moisture, fire, pests, and harsh weather—perfect for Long Island’s coastal climate. Unlike traditional materials, it won’t warp, rot, or crack, and it holds paint longer for lasting curb appeal. Choose from a wide range of textures and colors to match your home’s architectural style, and enjoy peace of mind with professional installation and industry-leading warranties.
VINYL SIDING
Smart & Cost-Effective
Vinyl siding from Thermo-Seal is a smart, cost-effective way to enhance your home’s appearance and energy efficiency. Designed for durability and low maintenance, our vinyl siding resists fading, cracking, and warping—even in Long Island’s harsh weather conditions. Available in a wide range of colors, styles, and textures, it provides the look of real wood without the upkeep. With insulated options to help reduce energy bills and improve indoor comfort, Thermo-Seal’s vinyl siding is professionally installed and backed by decades of trusted service and strong manufacturer warranties.
Wood Siding
Timeless Beauty, Natural Warmth
Bring classic charm and natural elegance to your home with wood siding from Thermo-Seal. Known for its rich texture and unmatched curb appeal, wood siding offers versatility in style, from traditional clapboard to rustic shingles. Ideal for homeowners who value authenticity and architectural character, our premium-grade wood siding is crafted for lasting performance and strong insulation. With proper sealing and maintenance, it stands up to the elements and delivers a warm, organic look that can be painted or stained to match any design vision. Thermo-Seal ensures expert installation and guidance to keep your wood siding beautiful for years to come.
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.
Get Your Free Siding Quote Today
Upgrade your exterior with confidence. Call 631-849-0434 or fill out the form to schedule a free, no-obligation siding consultation with our Long Island team.
