Quality Composite Windows to Upgrade Your Home in the Tri-State Area


You’ve got plenty of choices for new windows across the Tri-State Area, but why settle for less when you can choose the finest composite windows from a trusted group of home improvement experts?Thermo-Seal Windows and Siding is here to provide window services that will make any other window contractor look like an amateur. Our work as a window company has a sterling reputation backed by decades of experience and an A+ with the Better Business Bureau. Are you ready to experience the Thermo-Seal difference?

Choose Composite for a Premium Choice

If it’s time to invest significantly in your home, composite replacement windows can be a wise choice. Why? Thermo-Seal’s composite windows are superior in durability, energy efficiency, and low maintenance. Harvey, a leader in window engineering, manufactures our line of custom windows. These windows provide excellent insulation that can reduce energy bills over the first few months of use. Imagine paying for your windows from the cost savings they generate!Of course, it’s not just about features. With their attractive aesthetics and long lifespan, composite windows enhance your home's value and comfort, making them an innovative and cost-effective choice in window replacement.

Thermo-Seal’s Window Installation Services

New composite windows mean nothing if you don’t have the expertise of a company like ours to install them. Our experience in the market allows us to know exactly how to install your new windows with an eye toward performance and durability. When we’re done installing your new windows, you’ll wonder why you ever took so long to call us!

Themo-Seal Makes it Easy!

At Thermo-Seal Windows and Siding, customer satisfaction is critical. When you’re in the market for composite windows that deliver style and functionality, we have what it takes to handle your business. Contact us now to learn more.

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Five-Star Reviews

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.

Tampa, FL

"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.

Tampa, FL

"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.

Tampa, FL

"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.

Tampa, FL

"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.

Tampa, FL

"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.

Tampa, FL

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