A fireplace is more than just a source of warmth—it's a focal point, a statement of style, and often the heart of a home. While fireplaces have shaped human life since prehistoric times, the architectural fireplace as we know it has evolved and, by extension, the terminology we use to talk about it.

This guide breaks down the most commonly used fireplace terms so you can feel confident in customizing your hearth or selecting a ready-made piece that fits your vision and project.

Fireplace Terms 101: Everything You Need to Know Before Designing Your Own

When it comes to the anatomy of a fireplace—gas, electric, or a more traditional wood-burning fireplace—you'll quickly discover the vast vocabulary that comes with it. From the mantel shelf to the firebox, understanding these terms can streamline the shopping or design process.

Firebox

The firebox is the part of your fireplace that is typically built into the wall. It's where the fire burns, and while most of it is hidden, you might be able to see the back wall or interior lining. 

Homeowners often install fireplace inserts to increase heating efficiency and update the fireplace's appearance. The firebox, designed with fire-resistant materials to handle direct flames and high heat, is a permanent architectural feature critical for the safety and functionality of all types of fireplaces.

Mantel

The mantel is the top horizontal protruding shelf/ledge over a firebox. A fireplace mantel spans the top of a firebox and is often supported by legs, generally the deepest and heaviest section of the fireplace. It can also be floating, supported by corbels, and appear well above the firebox or right in line with the opening.

Mantel Shelf

The mantel may or may not have the depth or design to function as a shelf, though it is a must-have for many homeowners and a popular place to decorate. A mantel shelf may be floating or incorporated into a complete fireplace surround.

Hearth

The hearth refers to the horizontal floor area directly in front of the firebox opening. A fireplace hearth is usually as wide as the firebox and the legs combined. Its depth is strictly circumscribed, anywhere from 18 inches to 24 inches. Local building codes may govern the depth and acceptable materials for the hearth.

Surround

The fireplace surround is commonly used to refer to the decorative and structural assembly framing the fireplace: mantel, legs, and returns. Ultimately, it is what makes up all parts of a fireplace in its entirety. The only exception to this would be the firebox itself.

The surround works harmoniously with the hearth—the floor-level platform in front of the firebox—to create a unified and intentional design. Together, these elements contribute to the aesthetic impact of the room. A well-crafted surround can turn your fireplace into the centerpiece of a space, drawing people in and setting the stage for a beautiful fire.

Corbel

The bracket or block that projects from the face of a wall is called the corbel. While physically and visually supporting elements are placed above it, the corbel is a popular fireplace design found on either side of the fireplace opening beneath the mantel.

Plinth

The lowest part of the leg on a fireplace, often referred to as the "foot," is called the plinth. This decorative transition piece between the leg and the hearth is referred to as the base of the fireplace.

A custom fireplace demands precision, starting with a clear understanding of its core terminology. Familiarity with terms like firebox, hearth, and surround enables you to communicate your vision accurately when you request a bespoke fireplace design from MATERIAL's in-house experts, ensuring intentionality in every detail.

Create Your Ideal Fireplace

At its best, a fireplace is more than a heat source—it's an experience. It creates ambiance, anchors a room, and elevates everyday living. MATERIAL specializes in bespoke fireplaces crafted for interior and exterior applications, whether you want to add a touch of marble or hand-carved natural limestone. As pioneers in material selection and bespoke fabrication, we help bring your vision to life—one fireplace at a time.

FAQs: Your Questions Answered on Fireplace Design

You've now got a solid foundation in fireplace terminology—but there's so much more to explore when it comes to creating a truly custom, design-forward fireplace. Below are ways to continue your journey and make more confident, creative, and informed decisions:

1. What are the different types of fireplaces, and what should you consider when choosing one?

Each fireplace type—gas, electric, or wood-burning—offers unique benefits, aesthetics, and considerations. Explore installation options, maintenance needs, and how each supports different design visions. A ventless fireplace, for example, allows for greater placement flexibility and minimalist framing, perfect for sleek interiors.

2. What is the process for designing a custom fireplace?

Designing a custom fireplace involves more than selecting finishes. Learn how to choose the right dimensions, placement, and style to complement your space. Our experts help you select each element, including hearth sizing, mantel detailing, and how to safely and beautifully meet building codes.

3. How can one visualize a custom fireplace design before it's built?

MATERIAL offers augmented reality (AR) technology that allows you to visualize a fireplace in your space from any perspective. Position the fireplace in your desired location and adjust the position, scale, and angle for the perfect fit.

4. How does MATERIAL balance function and beauty in fireplace design?

Great design never sacrifices efficiency. We prioritize the right natural stone material, heat efficiency, and safe, code-compliant construction—without compromising elegance.

5. How do I get started on my bespoke fireplace with MATERIAL?

Ready to bring your dream fireplace to life? Contact our team for a consultation or custom quote. From inspiration to installation, we're here to help craft a one-of-a-kind fireside experience that reflects your style, space, and story.