How to Build a Custom Mantel Top with Wood Molding

When we received a letter from Jacky detailing her mantel makeover, we were excited to share the impressive before-and-after photos. Her project is a great example of a budget-friendly DIY mantel transformation that updated a challenging curved concrete mantel and a large frameless mirror into a polished focal point for the living room.

I’m a BIG fan of your site. I wanted to share my living room makeover with you. We had an oddly shaped concrete mantel and left it alone for more than two years because we didn’t know what to do with it. After browsing your archives, I felt inspired to tackle the entire mantel wall.

First, I picked up two pieces of reclaimed wood molding and a 1×12 board for about $30 and began building a custom mantel top. With my husband tied up at work, I decided to handle the carpentry myself. Using a chop saw and finish nails, I assembled the pieces, primed, and painted everything with two coats of semi-gloss white. Because the concrete surround looked dingy next to the freshly painted mantel, I painted the concrete the same white and then set the mantel cap on top. I love the clean curve created by the crown molding and crisp white paint.

Next, I tackled the huge mirror above the mantel. I’d hoped to buy a smaller framed mirror, but couldn’t find one that fit our budget. Rather than remove the large heavy mirror, I installed a wood frame directly over it. I used salvaged molding at 35 cents per foot, cut 45-degree corners, and finished the frame with two coats of a rich ebony stain. Installing the frame was a little tricky, but a helpful tip from a local hardware employee suggested using double-sided tape, which made installation simple and effective.

-Jacky

Below is the original view of Jacky’s curved concrete mantel with the oversized frameless mirror. The unusual shape and the scale of the mirror made styling the space difficult, which is why she left it untouched for so long.

Before: curved concrete fireplace mantel and large frameless mirror

And here is the transformed mantel wall. The new custom mantel top, painted concrete surround, and the newly framed mirror create a cohesive, elegant look that reads custom-built. Small, inexpensive materials and a willingness to DIY turned an awkward feature into a refined focal point.

After: updated mantel with framed mirror and painted surround

Jacky’s project highlights several practical DIY mantel makeover tips: choose reclaimed or budget-friendly molding, build a simple mantel cap from a 1×12 board, match the paint on adjacent surfaces for a seamless look, and consider framing an existing mirror rather than removing a heavy piece. These techniques deliver big visual impact without a big budget.

We love seeing readers take on projects like this and share the results. Jacky’s combination of creativity, resourcefulness, and a few basic tools produced a polished mantel update that complements her living room while staying budget-conscious. Thanks, Jacky, for sending your story and photos—your makeover is a terrific example of thoughtful DIY design and sensible home improvement.