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Top-Quality Replacement Windows Available to Homeowners in Rockland County, NY

Are the windows on your home old and worn? Do you feel frustrated by their unsightly appearance and poor functionality? If so, now is the time to turn to Thermo-Seal Windows & Siding. Since 1985, we have proudly installed best-in-class replacement windows for homeowners throughout the Rockland County, New York, area.

Our Replacement Windows

We offer our own line of custom windows, which are manufactured by our partner, Harvey Building Products. We also install replacement windows from Andersen and Pella—both companies are known for crafting durable and attractive products. What’s more, we are an Andersen Certified Contractor, so rest assured we have the know-how to complete your project correctly the first time.

At Thermo-Seal Windows & Siding, our replacement windows are:

  • Offered in different materials, including wood, thermoplastic, composite, and vinyl 
  • Available in various popular styles, such as slider, garden, casement, picture, bay, bow, double hung, and completely custom window styles and shapes 
  • Backed by a 100% satisfaction guarantee and a limited lifetime warranty which covers defects or seal failures on all mechanical and vinyl components  
  • Energy efficient and can help reduce your heating and cooling expenses by up to one-third 
  • Easy to care for and require minimal upkeep
  • Able to help reduce the infiltration of outdoor noise 

No matter which type of replacement window you choose, we will complete your window installation with great attention to detail and unmatched customer service.

Contact Your Local Window Installation Experts Today 

For more information about the replacement windows we install for homeowners in Rockland County, NY, contact Thermo-Seal Windows & Siding today. We look forward to providing a virtual or in-home estimate for your window project and going over our convenient financing options.

We make clients happy.

We Make it Easy

With customer service and craftsmanship that’s second-to-none, we make it easy
to achieve the home of your dreams.
Free, No Hassle Estimates Schedule a free in-home or virtual estimate. We’re here to help!
High Quality Products We offer the best products available, including our own brand of replacement windows.
Satisfaction Guarantee Our job is not done until you’re completely satisfied.

We've got connections.

We're certified by the industry’s leading manufacturers to offer a wide range of top quality options. View Our Credentials

We offer multiple locations to serve you throughout the Tri-State area including Rye, Westchester County, Melville, and Stamford.

456 Sunrise Highway
Rockville Center, NY 11570
(866) 281-4567
Melville Office
68 South Service Road
Melville, NY 11747
(866) 281-4567
Rye Corporate Office
411 Theodore Fremd Avenue
Rye, NY 10580
(914) 925-3443
Stamford Office
263 Tresser Blvd
Stamford, CT 06901
(203) 663-3534