How to Build an Extended Fireplace Mantel

Add height to a room with these step-by-step instructions.
HRIPR211-_Fireplace

HRIPR211-_Fireplace

Related To:

This project creates the illusion of additional height, and it's great for accentuating a stone wall if you happen to have one.

Materials and Tools:

tape measure
router and bit
nail gun
jigsaw
¾-inch medium-density fiberboard (MDF) with the right dimensions to accommodate the specific mantel
T-square
large round plate or bowl
wood glue
caulk
paint
paintbrush

Steps:

1. Measure the height from the top of the existing fireplace to the ceiling. This will be the measurement used for the height of the MDF.
2. Measure the width of the existing fireplace.
3. Using the T-square, transfer the dimensions onto the MDF.
4. To create the crown and arch of the top of the mantel, you will need to decide how far to extend the width and then mark the MDF. This measurement needs to be equal on both sides.
5. Decide the height of the crown and mark it on the MDF.
6. Place a large plate or bowl upside down and use its arc to connect the bottom of the crown to the inset of the mantel.
7. Use the jigsaw to cut out the frame drawn on the MDF.
8. Any accent pieces can be cut out from the scraps of MDF and nailed to the face of the mantel if desired. For the pictured project, four symmetrical stripes were cut out and attached with the wood glue and the nail gun. We then cut out a diamond and centered it in the middle of the mantel.
9. Using a router, finish off the outside edges of the frame. Be sure to leave the top and bottom unfinished. This will help to create a seamless transition between the old fireplace and the new mantel. If desired, the accent pieces that have been attached can also be routed.
10. Rest the entire frame on the existing fireplace.
11. Run a bead of caulk across the top and bottom of the frame. This will seal it into place.
12. Paint both the new frame and the fireplace.

Keep Reading

Next Up

How to Build a New Fireplace Surround and Mantel

A dated fireplace is given a British Colonial look with the addition of staircase posts, molding and a coat of fresh paint.

How to Build an Outdoor Stacked Stone Fireplace

Add fireside ambiance to your backyard with an outdoor fireplace made with stacked stone.

How to Plan for Building an Outdoor Fireplace

Learn how to plan for building an outdoor fireplace, and get tips and tricks for creating a warm and welcoming focal point for your outdoor living space.

How to Build a Wood Pergola

Pergolas provide some much needed shade from the summer sun. Learn how to build a pergola with these step-by-step instructions.

How to Build a Concrete Fireplace Hearth

Carter builds a new concrete hearth to update an old 1950s fireplace.

How to Build a French Drain

If you're having problems with standing water in your yard or a leaky basement, improper drainage is the culprit. Fix your water drainage issues once and for all by adding a French drain in just a few short steps.

How to Build an Outdoor Minibar

Build an outdoor bar complete with a miniature refrigerator, bottle opener and towel hooks.

How to Build a Fire Pit

Embrace one of the hottest outdoor living trends by building a fire pit. Learn what steps to take before getting all fired up.

How to Build a Retractable Canopy

Control the shade by making your own retractable canopy. Open it up to create a shady retreat or close it to let the sun in.

On TV

Shop This Look

Found a living space you love in HGTV's Photo Library? Get the look in your own home with products from Wayfair.

Follow Us Everywhere

Join the party! Don't miss HGTV in your favorite social media feeds.