Expert remodeling
Siding Installation & Replacement in Long Island, NY
40 Years of Experience
Certified Professionals
Superior Workmanship with Proven Reputation
Stress-Free Process
Thermo-Seal Windows, Siding & Roofing, Inc.
Siding in Long Island That Delivers Lasting Protection and Local Style
Looking for siding replacement in Long Island, NY? Thermo-Seal has been a trusted name in exterior upgrades for over 40 years, helping homeowners from Nassau to Suffolk boost curb appeal and energy efficiency with premium siding solutions. Whether your home is in Massapequa, Port Jefferson, or anywhere in between, our siding is built to stand up to Long Island’s weather and match its diverse architectural styles.
Our in-house, factory-trained team completes every project—no subcontractors—so you can expect precision and accountability at every step. If your siding is cracked, faded, or no longer protecting your home, we provide Long Island siding services that transform both appearance and performance.
Thermo-Seal Exterior Remodeling
Full-Service Siding Installation in Long Island for Coastal Resilience
Long Island homes face salty air, strong winds, and seasonal temperature shifts. Thermo-Seal installs high-performance vinyl and fiber cement siding from brands like James Hardie, engineered to handle these unique challenges without losing their look or integrity.
✔ Installed by our full-time, certified team
✔ Designed to resist Long Island’s coastal and seasonal conditions
✔ Available in a wide range of styles and finishes to suit every home
Why Long Island Homeowners Trust Thermo-Seal for Siding
With more than 20,000 exterior remodeling projects completed since 1985, Thermo-Seal is the go-to source for siding installation in Long Island. Homeowners choose us for dependable service, expert craftsmanship, and long-lasting results.
Why Long Island residents choose Thermo-Seal:
✔ James Hardie Certified – Specialists in fiber cement siding systems
✔ No Subcontractors – Our own team handles every detail
✔ A+ BBB Rating – A strong reputation built on consistent, reliable work
✔ Weather-Resistant Products – Designed to withstand wind, moisture, and salt
✔ Energy-Efficient Solutions – Boost insulation and lower utility bills
From the Hamptons to Hicksville, Thermo-Seal installs siding on Long Island that performs through every season.
Siding in Long Island That Solves Everyday Home Exterior Issues
Worn-out siding can lead to rising energy bills, water damage, and constant upkeep. Thermo-Seal installs siding in Long Island that addresses these common homeowner concerns while improving aesthetics and durability.
✔ Cracked or Rotting Siding? Our materials resist moisture and decay
✔ Energy Inefficiency? Upgraded siding improves insulation year-round
✔ Too Much Maintenance? Low-maintenance options retain color and shape
✔ Weather Exposure? Durable siding shields your home from wind and rain
Thermo-Seal delivers siding replacement in Long Island that protects your investment and keeps your home looking sharp.
Schedule Your Free Estimate Today
Ready to transform your home’s exterior with expert remodeling that lasts? Contact Thermo-Seal today for a free in-home estimate and experience why thousands of homeowners across New York and Connecticut trust us for windows, siding, roofing, doors, and more.
Request A Free Estimate
Service Area
Services We Offer:
Upgrade Your Home Now & Pay Later – Interest Free!
For a limited time, enjoy convenient financing with 0% interest for up to 25 months.
Contact Info.
Phone Number:
Email Address:
Showroom:
456 Sunrise Highway, Rockville Center NY 11570 - (516) 689-7214
Rye Corporate Office:
411 Theodore Fremd Avenue, Rye NY 10580 - (914) 635-3748
Stamford Office:
263 Tresser Blvd., Stamford, CT 06901 - (203) 990-1812
Melville Office:
68 South Service Road., Melville NY 11747 - (631) 710-6937
CLIENT REVIEWS
What Our Clients Are Saying About Us
Thermo-seal Windows provides exceptional customer service alongside high-quality products. Recently, I had the majority of my home's windows replaced by Aaron's team, and their performance was nothing short of impressive. They arrived on time, maintained a tidy work area, and dedicated themselves to ensuring a perfect installation of the windows.
Aaron and his team were amazing, from start to finish! They worked with us every step of the way and Aaron was always just a call or text away to answer any questions we had. The windows are perfect and we love them. We highly recommend working with Aaron and his team. They are professional, courteous and their work is top notch!
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