What’s the difference between a round top and arch window?

Arch and round top windows can be used interchangeably to describe windows with a curve at the top. They’re inoperable windows and get installed above casement, double hung, single hung windows.

Which windows do round top windows look best on top of?

Arch and round top windows can get installed above several types of windows. Common assemblies include installing arch and round top windows above double hung and single hung windows, casement windows, and picture windows.

Can you open round top windows?

Round top and arch windows remain inoperable because they get direct glazed into the frame.

What is a Palladian window?

A Palladian window is large window with an arch window in the middle, flanked by two narrow rectangle windows. The windows take their name from 16th century architect Andrea Palladio, who included symmetry and proportional style.

How do you measure an arch window for replacement?

To measure an arch window for replacement you need to measure the width of the window at its base. Measure from the inside corner at one end of the base to the other corner of the base. Then you want to measure the tallest point of the window for the height. Sometimes people will want a perfect arch window. That means the height of the arch is exactly half the width of the base width.

Are arched windows outdated?

No, arched windows are not outdated. They continue to appear in homes as a great way to add natural light and curb appeal. Arched windows have timeless character despite their prominence in older homes. Arch windows fit well in contemporary homes above entry doors to enhance a foyer to give it a warm, welcoming feel.

Are arched windows more expensive?

Arch window prices depend on several factors. The size of the window, installation needs, and design options affect arched window costs. A Marvin Replacement design consultant can review details with you to provide arch window prices.

ARCH WINDOW REPLACEMENT AND ROUND TOP

Interior view of a white arch window above double hung windows.

Interior view of a white arch window with grilles above two double hung windows.

Two small boys and a mother roast marshmallows in a firepit on a patio.

Marvin Replacement Arch and Round Top windows are arch-shaped fixed windows that add traditional character and additional sunlight to your home.

MARVIN REPLACEMENT ROUND TOP WINDOW FEATURES

20 round top shapes available
Available in custom sizes
Expands viewing areas
Additional curb appeal

Line Break

Get your project started by booking a free appointment with one of our design consultants.

SCHEDULE YOUR CONSULTATION

WHY CHOOSE MARVIN REPLACEMENT ARCH + ROUND TOP WINDOWS?

Style

Arch and round top windows fit perfectly with classically styled homes.

Elegance

Arch and round top windows add elegance and character with curved design.

Low Maintenance

Our tough acrylic finish resists fading, dents, and cracks.

Replacement Round Top Window Design Options

Replacement Round Top Window Styles

Marvin Replacement Round Top windows feature a variety of styles that impact the design of your home. Our round top windows elegantly break up the sharpness of straight lines and fit stylishly into areas to provide a bigger view, like a front door arch window.

Round top and arch windows come in 20 styles, including:

Eyebrow
Eyebrow Above Springline
Full Circle
Half Round
Half Round Above Springline
Quarter Eyebrow
Quarter Eyebrow Horizontal
Quarter Eyebrow Above Springline
Quarter Round Above Springline

Selected: Eyebrow

Example of a Marvin Replacement round top eyebrow window.

Marvin Replacement Eyebrow Above Springline Window

Marvin Replacement White Full Circle Window

Marvin Replacement White Half Round Window

Marvin Replacement Half Round Above Springline

Marvin Replacement white quarter eyebrow window

Marvin Replacement Horizontal Quarter Eyebrow Window

Marvin Replacement Quarter Eyebrow Above Springline

Marvin Replacement Half Round over Casement

Marvin Replacement Half Round Over Picture

Marvin Replacement Round Top Picture Three Wide Mull

Configurations

Round top windows can come as a round top double hung mull where a round top sits above a double hung window.

A half round can fit above a casement window for a half round over casement assembly.

A half round over picture assembly can place a half round window above a picture window.

A round top casement three-wide mull can have casement windows at each end and a picture window in the middle with a round top above it.

Exterior Colors

Our finish stands up to the elements, so much so that 48,000 hours of sun can't fade our finish* and our fade-resistant acrylic finish resists scratches, chalking, chipping, denting, and peeling. Choose from seven stunning exterior colors to boost your curb appeal.

Selected: Stone White

Exterior side of a Marvin Replacement Round Top window in a Stone White color finish.

Marvin's Ultrex® fiberglass finish is verified to the American Architectural Manufacturers Association (AAMA) 624 specification. Achieving AAMA 624 verification means that our Ultrex finish has passed rigorous tests that simulate the harsh conditions a finish can encounter throughout the life of a window or door.

*Average sunlight exposure per 10 years

Interior Colors

We use the same tough acrylic finish on our four interior color options that we use on our exterior colors. You can also choose our stainable EverWood® finish for the look of wood without the maintenance.

Selected: Stone White

Interior side of a Marvin Replacement Round Top window with a Stone White color finish.

1. Bronze interior is only available with Bronze exterior

2. Ebony interior is only available with Ebony exterior

3. Sierra interior is not available with Ebony exterior

Finish samples are approximate. Schedule a design consultation for an up close view of color options.

Glass Coatings

Our experts will walk you through energy efficient glass options to find the right selection for your home and the best windows for your climate. Choose from four glass coatings, plus decorative glass options, and specialty glass choices.

Low E-1

Primarily used in colder climates, Low E1 allows more heat in to warm a room while blocking heat loss.

Low E-2

Low E2 offers year-round performance in moderate climates. It will help retain heat in your home during the winter and keep heat out during the summer.

Low E-3

Low E3 rejects solar heat while letting light in, resulting in increased performance in climates with intense sun exposure.

Low E-3/ERS

Low E3/ERS provides maximum efficiency year-round in all conditions.

Selected: Low E1

Decorative Glass

Decorative glass options are ideal for spaces like bathrooms to balance natural light and privacy.

Selected: Rain

Marvin Replacement Reeded Decorative glass

Example of Marvin Replacement Gray Tint Decorative Glass

Sample of Marvin Replacement Green Tint Decorative Glass option.

Example of Marvin Replacement Bronze Tint Decorative Glass.

Specialty Glass

Marvin Replacement offers specialty glass to best suit the needs of your home. You can choose tempered glass, laminated glass, and STC/OITC glass for specific windows and rooms.

Tempered Glass

Tempered glass increases glass strength to help prevent breakage. Tempered glass is ideal for windows close to the floor or located in high-traffic areas.

Laminated Glass

Even more durable than tempered glass, laminated glass is often referred to as impact resistant or safety glass due to its vinyl inter layer that tends to remain in place when shattered.

STC/OITC Glass

Sound Transmission Class and Outdoor-Indoor Transmission Class glass has increased pane thickness on the room side and works in areas where exterior noise is a concern.

Divided Lites

We offer various divided lite patterns so you can replicate the look of your original windows and doors. Or, add new architectural interest to your home. Choose from Simulated Divided Lites for classic appeal or Grilles-Between-the-Glass for easy cleaning.

Patterns include: Circle Dual Hub Six Spokes, Equal Rectangular, Half Round Above Springline Dual Hub Three Spokes, Half Round Above Springline Open Hub Three Spokes, Half Round Solid Hub Three Spokes, and Quarter Round Open Hub.

Selected: Grilles-Between-the-Glass

Cutaway of Marvin Replacement Grilles Between the Glass

Cutaway of a Marvin Replacement window with Simulated Divided Lites.

Marvin Replacement Round Top Equal-Rectangular

Marvin Replacement Half-Round Spoke Lites

Marvin Replacement Quarter-Round-Open-Hub

Maintenance

Since Round Top and Arch windows come as direct glaze windows, they do not require any maintenance for hardware or weatherstripping. You can clean them occasionally, and maintain the surfaces on the same schedule as your other windows.

ROUND TOP WINDOW DESIGN

Round top windows can add natural light and architectural interest to your home with arched windows. They fit perfectly above windows to create unique style for your home and break up straight lines. Round top windows are fixed windows glazed directly into the frame.

Add architectural appeal and more natural sunlight to your home with Marvin Replacement Round Top windows. The curve of a Round Top window can soften a home’s look and add character.

Frequently Asked Questions

Arch and round top windows can be used interchangeably to describe windows with a curve at the top. They’re inoperable windows and get installed above casement, double hung, single hung windows.
Arch and round top windows can get installed above several types of windows. Common assemblies include installing arch and round top windows above double hung and single hung windows, casement windows, and picture windows.
Round top and arch windows remain inoperable because they get direct glazed into the frame.
A Palladian window is large window with an arch window in the middle, flanked by two narrow rectangle windows. The windows take their name from 16th century architect Andrea Palladio, who included symmetry and proportional style.
To measure an arch window for replacement you need to measure the width of the window at its base. Measure from the inside corner at one end of the base to the other corner of the base. Then you want to measure the tallest point of the window for the height. Sometimes people will want a perfect arch window. That means the height of the arch is exactly half the width of the base width.
No, arched windows are not outdated. They continue to appear in homes as a great way to add natural light and curb appeal. Arched windows have timeless character despite their prominence in older homes. Arch windows fit well in contemporary homes above entry doors to enhance a foyer to give it a warm, welcoming feel.
Arch window prices depend on several factors. The size of the window, installation needs, and design options affect arched window costs. A Marvin Replacement design consultant can review details with you to provide arch window prices.

Arch and Round Top Window Project Transformations

Exterior view of a picture window featuring a round top window above on a brick home.

Old round top and picture window

Exterior view of a Marvin Replacement Round Top window above a picture window with white divided lites on a brick home.

New Marvin Replacement Round Top and Picture Window

Added Assurance

Marvin Replacement windows and patio doors come with a limited lifetime warranty as well as a 5-year installation warranty to provide additional peace of mind.

Marvin Replacement Warranty

Looking for More Window Information?

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Marvin Replacement Awning window in a bedroom with hardwood floor

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Windows to Improve Air Circulation

Marvin Replacement window installer places a window

Fiberglass vs. Vinyl Windows

Discover the differences between fiberglass and vinyl windows, and why fiberglass windows have more strength.

Fiberglass vs. Vinyl Windows

Schedule Your Free Consultation

Interior view of an opened Marvin Replacement bi-fold patio door.

If you’re ready to get started, discuss your replacement window and door options with a Marvin Replacement design consultant. We’re here to answer any questions you may have, and help make your project easy.

Schedule your consultation