How to Build a Frame for an Electric Fireplace Insert

Last reviewed: September 15, 2026

If you don't have an existing fireplace opening for your electric insert, building a simple wood frame is a straightforward weekend project that most DIYers can handle without a contractor.

Before you start: choose your insert

Confirm your insert's exact width, height, and depth before building anything — the frame needs to be sized to the unit, not the other way around. Popular current options include the Modern Flames Redstone Built-In Series, Modern Flames Orion Traditional Built-In Series, Touchstone Fireplug Pro, and Dimplex Revillusion Series. If you're still comparing options, see our Electric Fireplace Inserts.

Choosing a location

Pick a spot with easy access to a power outlet, ideally positioned so the cord doesn't need to run across the wall. Most electric inserts plug into a standard outlet; check your specific model's electrical requirements before finalizing the location.

Materials you'll need

• Measuring tape
• Plywood
• Wood screws and pocket screws
• Drill
• Sander
• Table saw

Building the frame

1. Build the base

Build a rectangular base sized to your insert, with a center support piece cut to the exact width of the base for added stability. Join the frame pieces with screws, then attach the center support.

2. Build the frame around the insert

Construct the front opening first, then build the surrounding frame to match. Keep the frame height and base thickness consistent as you go so the insert sits level once installed.

3. Install the frame

Once assembled, set the frame onto the base and position the whole structure against the wall so it rests securely.

4. Cover the frame

Cut plywood panels to match the width and length of your baseboard, then attach them to the top and front of the frame. Plywood is the standard choice here since it's easy to cut precisely and holds up well over time.

5. Add a mantel (optional)

If you want a mantel, cut a half-inch plywood top piece, mark and trim it to fit, then attach it with 1.5-inch brad nails.

6. Fill the seams

Use wood filler on all seams and nail holes for a smooth finish and to avoid sharp edges.

7. Sand and paint

Sand the entire frame, wipe away dust, then paint or finish it to match your room.

Common mistakes

The first mistake is building the frame before confirming the insert's exact dimensions — measure your specific model first. The second is placing the outlet somewhere that forces the cord to run visibly across the frame.

Frequently asked questions

Do I need a professional to build an electric fireplace frame?

Not usually. This is a project most people with basic woodworking tools and experience can complete themselves.

What materials work best for framing an electric insert?

Plywood is the standard choice for both the structural frame and the covering panels, since it cuts precisely and holds a finish well.

Should I build the frame before or after choosing my insert?

After. Build the frame to your specific insert's exact dimensions rather than guessing and hoping it fits.

Do I need an electrician for a plug-in insert?

Usually not, if the insert plugs into an existing standard outlet on its own circuit. Check your specific model's electrical requirements to be sure.

Can I add a mantel to the frame later?

Yes, a mantel can typically be added at the end of the build or afterward, since it attaches to the top of the completed frame.

Related guides from Very Good Fireplaces

• Electric Fireplace Inserts
• How Much Does an Electric Fireplace Installation Cost?
• Recessed vs Wall Mounted Electric Fireplaces
• How to Make an Electric Fireplace Look More Realistic

Final thought

Measure your insert first, build to those exact dimensions, and this is a manageable weekend project even without prior carpentry experience.