Expert Window Installation & Replacement
Round-Top Windows
40 Years of Experience
Certified Professionals
Superior Workmanship with Proven Reputation
Stress-Free Process
Thermo-Seal Windows, Siding & Roofing, Inc.
Enhance Your Home’s Character with Stunning Round-Top Windows Installed by Certified Experts
Round-top windows—also known as arched windows, radius windows, or half-moon windows—are the perfect way to bring elegance, light, and architectural distinction into your home. At Thermo-Seal, we install high-performance, beautifully crafted round-top windows from top brands like Andersen, Pella, and Harvey. Whether you're replacing old windows or planning a remodel, our in-house team of certified professionals delivers flawless results that elevate both style and energy efficiency.
With over 40 years of experience and elite certifications, Thermo-Seal is the Tri-State’s trusted choice for precision window installation. Our round-top windows not only enhance curb appeal—they help increase your home’s value, improve natural lighting, and create a timeless look that makes a lasting impression.
Thermo-Seal Round-Top Windows
Why Choose Round-Top Windows for Your Home?
Round-top windows do more than add a graceful curve to your space—they completely transform the look and feel of any room. With their unique shape and ability to complement both modern and traditional architecture, round-top windows provide a visual focal point while boosting your home’s overall charm and market appeal.
Unlike standard square or rectangular designs, round-top windows add:
- Architectural interest and timeless beauty
- Increased natural light and visual height in a room
- Enhanced curb appeal that attracts buyers and appraisers
- Custom styling for historic, modern, or transitional homes
Whether used alone or paired above standard windows or doors, these elegant accents turn ordinary into extraordinary.
Thermo-Seal’s Expert Round-Top Window Installation
Not all round-top windows are created—or installed—equally. At Thermo-Seal, every round-top window installation is handled by our full-time, in-house professionals. We never subcontract, so you get consistent, high-quality results from start to finish.
Our process includes:
Precision Measurement
We take exact measurements to ensure your round-top windows are a perfect fit for your home’s unique architecture.
Premium Window Brands
We install high-quality round-top windows from industry leaders like Andersen, Harvey, and Pella for long-lasting performance and beauty.
Energy-Efficient Materials
Choose from top-performing materials like Fibrex®, fiberglass, wood, and vinyl—each designed to improve insulation and reduce energy costs.
Expert, In-House Installation
Our certified, full-time installers (never subcontractors) deliver flawless installation tailored to your home's style and structural needs.
We also offer round-top window replacements designed to match the original character of older homes—perfect for those looking to maintain historical integrity while upgrading performance.
What Are Windows with Rounded Tops Called?
Windows with rounded tops are commonly referred to as round-top windows, but you may also hear other terms such as arched windows, radius windows, domed windows, or half-moon windows. No matter what you call them, they all refer to a style of window featuring a curved or semi-circular top. At Thermo-Seal, we specialize in custom-fit round-top windows that suit every style and function—installed with care, precision, and backed by leading manufacturer warranties.
Do Round-Top Windows Add Value to a Home?
Yes—round-top windows can significantly increase property value. Their unique shape and elegant design add architectural distinction that sets your home apart in the market. In a competitive real estate landscape, round-top windows:
- Attract more attention from buyers
- Highlight design-forward upgrades
- Enhance both interior and exterior aesthetics
- Improve energy efficiency when installed properly
For homeowners looking to make a lasting investment in their property’s appeal, round-top windows offer beauty, functionality, and ROI in one stylish package.
Built for Beauty—and Built to Last
When you choose Thermo-Seal, you’re not just getting new windows. You’re getting 40+ years of craftsmanship, premium materials, and personalized service from start to finish. Every round-top window we install is engineered for long-term performance—resisting drafts, improving insulation, and reducing energy bills over time.
Our windows are not only elegant—they’re smart. Thermo-Seal’s energy-efficient round-top windows are designed to meet today’s highest performance standards while preserving the classic charm homeowners love.
Why Thermo-Seal Is the Tri-State’s Go-To for Round-Top Windows
Thermo-Seal isn’t your average remodeling company—we’re a fully licensed, award-winning team of in-house professionals committed to delivering exceptional results. Here’s what makes us different:
- 40+ years of trusted experience in the Tri-State Area
- Full-time, certified installers—no subcontractors, ever
- Elite partnerships with brands like Andersen, Pella, and Harvey
- A+ BBB rating and multiple Angi Super Service Awards
- Thousands of satisfied homeowners across NY, NJ, and CT
We back every installation with a customer satisfaction guarantee, ensuring your round-top windows are a seamless blend of beauty and performance.
FAQs About Round-Top Windows
1. Can round-top windows be opened?
Most round-top windows are fixed and do not open, especially those installed for decorative purposes or above standard rectangular windows. However, some custom designs may incorporate operable sashes. At Thermo-Seal, we can help you choose the right configuration based on your ventilation and aesthetic goals.
2. What materials are round-top windows made from?
We offer round-top windows in high-quality materials including Fibrex® (a composite material from Andersen), fiberglass, vinyl, and wood. The choice depends on your home’s style, insulation needs, and budget. Each material we offer is engineered for durability, energy performance, and design flexibility.
3. Are round-top windows energy efficient?
Yes, especially when installed by Thermo-Seal’s certified team. Our round-top windows come with advanced glass packages, insulated frames, and weather-tight seals that meet ENERGY STAR® standards. They’re just as efficient as standard windows—sometimes more so when properly installed.
4. How do I match round-top windows to my home’s existing style?
We specialize in customized window solutions that fit the architectural style of your home. Whether your home is historic, contemporary, or transitional, our designers help you select the right shape, frame, and grille pattern to complement your existing windows and design elements.
5. What is the installation timeline for round-top windows?
Once your custom windows are ordered, most installations are completed in a single day. Our team keeps you informed at every step, from initial consultation to final walkthrough. While lead times can vary by manufacturer, Thermo-Seal’s close partnerships often result in faster turnarounds than other contractors.
Ready to Elevate Your Home with Elegant Round-Top Windows?
Schedule your free in-home consultation with Thermo-Seal today and discover how our expertly installed round-top windows can add timeless beauty, efficiency, and value to your home.
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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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