Simple Fireplace Mantle

Header

Cut the header at an arch shape as shown above. Sand the cut edge to make sure the arch is even.

Inner Trim

Assuming that your 2x12s are 11 1/2″ wide (widths can vary, I choose to list the widest possible widths) cut your 2x4s and screw to the arched top. Don’t worry about getting a super strong joint, the joint will be reinforced from the back and sides. If you don’t have a Kreg Jig™, try just screwing at an angle from the 2×4 into the 2×12.

Legs

Now add the 4×4 posts to the sides as shown above. Back is flush. Use a drill bit the size of your screw heads to drill approximately 1/2 way through the 4×4 posts. Then use a drill bit the size of the screw shaft to drill the remaining way through the 4×4 posts. Screw the posts to the 2x4s with 3″ screws.

Top

If you’ve built a farmhouse bed, you are probably thinking, that all looks quite familiar. And in fact, this could easily double as a full size headboard. In this step, just screw the 2×4 to the top with 3″ screws.

Step 5

Back

Now simply screw the back paneling on.

Finishing

I finished mine by filling holes with wood filler, sanding, and then priming everything but the top. I painted two coats of paint in an muted oooops green paint, and stained the top with Minwax Express Color in Pecan. Make sure you screw through the 2×12 header into a stud in the wall behind the faux fireplace to keep it from tipping forward. Good luck and Happy Holidays!

Finishing

Sand all surfaces, starting with a medium grit and finishing with fine. Wipe off the dust, fill any holes or gaps with wood filler, and sand smooth once dry. Apply primer if you're painting, then finish with your choice of paint or stain and seal with a durable clear topcoat. For outdoor projects, use exterior-rated primer, paint or stain, and sealer so the piece stands up to the weather.