Expert remodeling
Window Installation & Replacement in Greenwich, CT
40 Years of Experience
Certified Professionals
Superior Workmanship with Proven Reputation
Stress-Free Process
Thermo-Seal Windows, Siding & Roofing, Inc.
Window Installation & Replacement in Greenwich, CT
Searching for high-quality window installation in Greenwich, CT? Thermo-Seal has provided Fairfield County homeowners with premium window replacements for over 40 years—balancing upscale design with energy efficiency. Whether your home is along the waterfront in Old Greenwich or tucked into the backcountry, our window solutions in Greenwich are crafted to elevate comfort and curb appeal.
All installations are performed by our in-house, factory-trained team—no subcontractors—ensuring precision, reliability, and seamless project execution. If your windows are drafty, dated, or difficult to operate, we install new windows in Greenwich that improve insulation and overall performance.
Thermo-Seal Exterior Remodeling
Full-Service Window Installation in Greenwich for Year-Round Comfort
From salty coastal air to snowy winters and hot, humid summers, Greenwich homes require windows that perform in every season. That’s why we use premium windows from top-tier brands like Andersen—built to withstand Connecticut’s changing conditions while maintaining elegance.
✔ Installed by our certified, in-house professionals
✔ Engineered to resist Greenwich’s coastal elements and temperature shifts
✔ Available in multiple styles to suit historic estates and modern homes alike
Why Greenwich Homeowners Choose Thermo-Seal for Window Replacement
With over 20,000 projects completed since 1985, Thermo-Seal has become a trusted name in Greenwich for delivering expert window installations backed by durable materials and dependable service.
Why Greenwich residents trust Thermo-Seal:
✔ Andersen Certified – Specialists in premium, energy-efficient window systems
✔ No Subcontractors – Every window project is completed by our trained crew
✔ A+ BBB Rating – Fairfield County’s go-to for honest, high-quality work
✔ Built for Coastal Living – Windows that resist moisture, warping, and UV damage
✔ Improved Energy Efficiency – Helps lower heating and cooling bills all year
From Cos Cob to Riverside, Thermo-Seal is Greenwich’s trusted provider for window replacements that enhance both function and design.
Window Replacement in Greenwich That Solves Common Home Issues
Outdated or poorly functioning windows can impact comfort, aesthetics, and energy use. Thermo-Seal installs windows in Greenwich that address these challenges with advanced materials and expert craftsmanship.
✔ Drafty or Noisy Rooms? Insulated windows provide better seals and sound control
✔ Hard to Open or Close? Smooth-operating systems designed for everyday use
✔ High Energy Bills? Multi-pane glass and tight seals help improve efficiency
✔ Maintenance Headaches? Low-maintenance frames stay looking clean and crisp
Thermo-Seal’s window installation in Greenwich improves your home’s performance while delivering a refined, updated look.
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.
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Service Area
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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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