How to make a DIY modern mantle

mantle makeover

Mantle makeover ideas are easier to implement when you actually have a mantle to make over, but when all you’ve got is a wall of rocks, you’ve got to take the extra step of making a mantle that fits the space.

mantle makeover ideas
Mantle makeover ideas are easier to implement when you have a mantle. Here, we just had a stone stack of wall.

Don’t get me wrong, I love crown molding and classic lines when it comes to a mantle. But let’s face it, it’s not for every house.

In this mission makeover, Theresa designed this modern mantle for a mid-century ‘rec room’ (do they still have those?). It brings  a kind of brutal rock wall some softness and order.

I don’t always love her designs, but I like it when I get to make something new, like a modern mantle.

Basically, it’s a box. But if you’ve ever tried to build a box, you know it’s easier said than done. But I try to take these mantle makeover ideas realistic and to bring them to life as simply as possible.

Shopping List

Top / Bottom – (2) 1x12x10 (or however long you want it) #1 pine

Front / Sides / Assembly blocks – (2) 1x6x10 #1 pine

Cleat – (1) 2x4x8

Concrete screws (Spax)

Nails or staples (I’m talking pneumatic here)

Some sharp saw blades on your miter and table saws will really help too.

How-to

The key to this look is sharp, clean edges. I do that with miters and bevels.

– Bevel the table saw to 45-degrees and run one edge of each 1×12 through. It’s kinda critical to keep the piece moving and flat on the table to prevent blade burn and imperfections. Outfeed support helps you get a cleaner cut.

– Run both edges of the 1×6 through. Doing this eliminates the end-grain of the pine, keeping the modern mantle’s texture clean and tight. Clip the ends on the miter saw.

– Measure the width of back of the 1×6—short point to short point of the bevel. It should be in the neighborhood of 4-inches. Cut four 10-inch long blocks, then rip them to the same width as the back of the 1×6.

– Cut the sides. These are beveled on three edges—front, top and bottom.

Assembly

-Fasten the front to the bottom in an L shape. Make sure all the bevels line up on both ends before fastening (there’s a lot going on here; a short sentence, but a lot to get right).

– Fasten each end piece to the L.

– Drop the top in and fasten. A few blocks (cut earlier) help support the top while you wrangle it into place. I like to squeeze the miters together with my hands and fasten.

– We fastened ours with 1 1/4-inch narrow crown staples, which we love for stuff like this. A lot. TGhe stapler too; it’s a Hitachi.

Installation

This is essentially a floating shelf like you see on TV shows. Comparatively, it’s huge, but the idea is the same.

– Install a cleat on the wall where you want mantle. We used a rotary hammer to pre-drill the pilot holes then Spax Multi-Material Screws to secure the 2×4 cleat to the wall veneer. One of Theresa’s excellent mantle makeover ideas a is the jaunty off-set from the fireplace, so that the mantle helps balance the asymmetrical fireplace.

– Place the mantle over the cleat and screw down through the top into the cleat.

And boom. Clean lines, crisp edges and a modern mantle that’ll make your inner Don Draper drop an extra ice cube in his cocktail.

mantle makeover ideas
The modern mantle starts coming together by cutting bevels on the table saw.
mantle makeover
Top, bottom and front along with two sides that are mitered on three sides.
mantle makeover
Make sure you right-size your modern mantle. Make a small sample and check it out.
mantle makeover
Start assembly by fastening the sides to the front. We used a pneumatic stapler for this. Awesomeness ensued.
mantle makeover
It doesn’t show much, but I like this photo. Done right, the mitered edges disappear leaving a sharp, clean and modern look.
mantle makeover
This one shows more. See the blocks inside the mantle? These help stabilize everything while you position and fasten the pine.
mantle makeover
Theresa figgerin’ her jaunty offset.
modern mantle
Theresa adding some serious Sherwin-Williams to the modern mantle.
mantle makeover
A rotary hammer drills the pilot holes in the stone veneer. Spax screws hold the cleat to the wall. I used a laser level to set it level.
mantle makeover
Last step: Fasten down through the top into the cleat.

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