Expert remodeling
Window Installation & Replacement in Fairfield County, CT
40 Years of Experience
Certified Professionals
Superior Workmanship with Proven Reputation
Stress-Free Process
Thermo-Seal Windows, Siding & Roofing, Inc.
Window Replacement in Fairfield County That Combines Efficiency and Timeless Design
Searching for professional window installation in Fairfield County, CT? For more than 40 years, Thermo-Seal has helped homeowners throughout the region—from Greenwich to Norwalk and beyond—upgrade their homes with windows designed for energy efficiency, durability, and architectural harmony.
All window installations are handled exclusively by our in-house, factory-trained team—never subcontractors—ensuring high-quality results with every project. If your home’s windows are drafty, outdated, or difficult to operate, Thermo-Seal provides Fairfield County window replacements that enhance both performance and appearance.
Thermo-Seal Exterior Remodeling
Full-Service Window Installation in Fairfield County Built for New England Weather
Connecticut’s climate demands windows that can handle everything from cold winters to humid summers. Thermo-Seal installs top-of-the-line windows from trusted brands like Andersen, designed to protect and insulate through every season.
✔ Installed by our in-house, certified professionals
✔ Built for Fairfield County’s coastal and inland weather patterns
✔ Available in a wide variety of styles to suit classic and modern homes
Why Fairfield County Homeowners Choose Thermo-Seal for Window Replacement
With over 20,000 projects completed since 1985, Thermo-Seal has earned a trusted reputation across Fairfield County. We deliver results that homeowners can depend on—combining top-tier products with expert craftsmanship.
Why Fairfield County homeowners choose Thermo-Seal:
✔ Andersen Certified – Experts in energy-efficient, high-performance window systems
✔ No Subcontractors – We handle every window install ourselves
✔ A+ BBB Rating – Known for integrity and long-term customer satisfaction
✔ Weather-Ready Materials – Resistant to moisture, warping, and fading
✔ Energy Efficiency – Improve indoor comfort and reduce energy use
From Stamford to Westport, Fairfield County homeowners count on Thermo-Seal for windows that are both stylish and strong.
Window Replacement in Fairfield County That Solves Common Home Issues
Old windows often lead to rising energy bills, poor insulation, and even structural concerns. Thermo-Seal installs windows in Fairfield County that solve these everyday challenges with advanced technology and long-term performance.
✔ Drafts or Foggy Glass? Our insulated windows seal tightly and stay clear
✔ Hard to Open or Close? We install smooth, reliable window systems
✔ Energy Loss? Modern windows help regulate indoor temps and cut costs
✔ Noise Pollution? Our multi-pane windows help reduce exterior sound
Thermo-Seal provides window installation in Fairfield County that delivers the function, efficiency, and elegance today’s homes demand.
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!
CONTACT US
Send us a Message
Service Area Bottom
5.0+
GOOGLE RATING
