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DIY Faux Fireplace Mantel

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Want a mantel to decorate with the seasons? Don’t have a fireplace in your home? Then you’ll love this diy faux fireplace project!

Hello friends! I’m so happy to be popping in from Making it in the Mountains again today to share this DIY Faux Fireplace instructions from a recent bedroom makeover. I have to say, I’ve been absolutely dying to share this beautiful DIY Faux Fireplace tutorial with y’all for weeks now – though we only just finished it up a few days ago, this fireplace has been on my mind for ages!

DIY Faux Fireplace

I haven’t told y’all yet, but BIG things are happening in the Mercer house lately … we’ve signed on to take part in the One Room Challenge! Have you heard of it? Basically, I’ve been working my butt off (with a ton of help from hubs) to completely transform one room in our home in just six weeks. That’s right folks … SIX WEEKS!

I wish I could plead ignorance as what I’ve gotten us into, but we actually participated in the Spring with this Rustic Boy Bedroom, so I knew the overwhelming blur of a six weeks I was in for. Taking part in the Spring had been A TON of work, but in the end, it was so nice to have an entire room completely and totally finished! Honestly, I think it was just the kick in the pants we needed to just finally get things done!

Curious as to which room we chose this time around?

I’m totally over-the-moon excited to create a Farmhouse Style Master Bedroom! Any gal will tell you how important it is to have a lovely place to relax after a long day’s work (whatever that work may be). In a house where I’m outnumbered by boys, I cannot wait to finally create a space for myself (though I suppose I may have to share this one with hubby too)!

With just six weeks to make it through the longest to-do-list ever, I’m literally eat, sleep and breathing all things master bedroom at the moment. Which leads me to today’s post …

I’ve been dreaming of a master bedroom with it’s own fireplace for years now. I just love the warmth and character that they bring to a room! Unfortunately, installing a fireplace in our bedroom just wasn’t in the budget this time around, but I’m thinking this DIY Faux Fireplace might just do the trick!

And I can’t wait to show you how we made it!

DIY Faux Fireplace

DIY Faux Fireplace


  • 2 – 2×6 cut to 48″
  • 2 – 2×6 cut to 36 3/4″
  • 2 – 1×2 cut to 48″
  • 1 – 2×12 cut to 50 1/2″ (we cut an arch into ours about 4″ deep at it’s peak)
  • 1 – 2×8 cut to 58″
  • 2 – 1×3 cut to 44 3/4″
  • 1 – 1×3 cut to 54.5″
  • 1 – 50 1/2″ x 47 3/4 (or cut to fit back) piece of 1/4 inch thick MDF
  • Jigsaw
  • Measuring Tape
  • Drill
  • Wood Screws
  • Finishing Nails
  • Sandpaper
  • Wood Filler
  • Paint
  • Paint Brush


1. The first step was cutting an arch into that 2×12. My husband came up with the most brilliant idea for this – he drew a rectangle onto the front of the board outlining where he wanted to create the arch, making it 4″ tall all the way along and stopping 5 1/2″ in from either end (where it would meet with the sides of the fireplace). Then, to turn the rectangle into an arch, he used a nail at either end and one in the middle to hold and bend a thin piece of wood (we used a spare piece of trim) creating a perfect arch shape to trace. Then, he simply cut along this line with a jig saw making a perfect arch. There’s probably some fancy tool that does this very job, but I thought my hubby’s creative arch-making idea was super smart!

DIY Faux Fireplace
2. With the arch made, it was time to start assembling the front. We started by attaching a 48″ 2×6 to the outside edge of one of the shorter 36 3/4″ 2×6’s, matching the bottom edges and securing it with several screws through the side, creating an “L” shape. We then matched the top of the shorter 2×6 to the bottom of the arch. After securing that all with a few more screws through the side into our 2×12, we were left with a front and side to our fireplace. We also added in a screw at an angle through the inside of the shorter 2×6 into the bottom of the 2×12, just outside the arch to help hold everything straight.

After working through these same steps on the other side, we had our front and sides assembled!

DIY Faux Fireplace*This would be a view from what will be the back of the fireplace.
3. The front and sides may have been put together, but they weren’t looking finished quite yet. Next up was adding some 1×3 trim along the top and sides to cover the joining of the 2×6’s underneath. Nailing the long piece along the top and the shorter 1×3’s down each side, left everything looking much more polished.

DIY Faux Fireplace
4. Next up we added a 1×2 piece to the back of our fireplace on the inside of each 2×6 side creating a spot to fasten the backing to. After cutting a piece of 1/4″ thick MDF to size (ours turned out to be 50 1/2″ x 47 3/4″), we simply nailed it to the back of our fireplace, into the 1×2’s on the inside of the sides. *Quick tip: painting the fireplace is infinitely easier before putting this backing on!

DIY Faux Fireplace*Hubs laid out a scrap piece of MDF on top of our 1×2 to show y’all how it all works.

DIY Faux Fireplace*Attaching the backing this way not only allows everything to sit flush, but leaves room for cuts that may not be perfectly straight!
5. Finally it was time to add on our 2×8 mantel and, after several screws in through the top, we had ourselves a fireplace!

DIY Faux Fireplace
To finish it all off, we puttied up all of the screw and nail holes and added a few coats of paint. In hindsight, I wish we would have filled the gaps where the 1×3’s joined together on the front too, so hopefully I can save you from making the same mistake.

And my friends, that’s it! A beautiful fireplace all for an afternoon’s work!

DIY Faux Fireplace

DIY Faux Fireplace

DIY Faux Fireplace

DIY Faux Fireplace

DIY Faux Fireplace

DIY Faux Fireplace

DIY Faux Fireplace
*Be sure to fasten it to the wall in some way – we secured ours with a couple of L brackets into the bottom of our mantel.

DIY Faux Fireplace-5DIY Faux Fireplace
I couldn’t be happier with how this turned out! I think it’ll add so much character and warmth to our new bedroom!

Wishing you a lovely day!


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About Kristi Mercer

Hi friends, I'm Kristi - lover of neutral colours, vintage charm and all things farmhouse! Follow along as we turn our first fixer-upper into the {farmhouse} of our dreams, one DIY project at a time.

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I'd love to chat with you in the comments!


  1. Jenna @ A Savory Feast says

    Ahh I love how this turned out! We don’t really need a real fireplace here in Florida, but I’ve always wanted a mantel to decorate. I’m already trying to figure out if I have a spot to make this work in my master bedroom…

    • Kristi says

      Awwwww, you should totally do it Jenna! It’s so cold here for so much of the year that I can’t even imagine what it would be like to not NEED a fireplace … this really would be the perfect solution!!!

  2. Carol says

    I love it. The only spot I could put it has hot water baseboard heat running across the wall. Any ideas how to modify it to accommodate the bump out for the heat cover?

    • Kristi says

      Thank you Carol! We actually have to cut a notch out of the back of ours to fit around our baseboard, would the same work for you around your baseboard heater? You could also add some sort of metal screen as backing to let the heat through if you needed to – I’ve seen beautiful ones at Hobby Lobby. Hope this helps, let me know if you have any more questions.

    • Kristi says

      Thank you SO much Marie! I’m so, so happy with how it turned out! Those armchairs belonged to my husband’s grandparents and are absolutely beautiful! Thanks again!!!

  3. Jackie says

    I love this idea, thanks for all info on cutting the wood. The fireplace really turned out well. I am going to use the instructions to build a real mantle for our family room. Currently we only has a wooden board, and need to make the room look more finished and cozier

    • Kristi says

      Thank you SO much Jackie! I’m so happy you found it helpful! If you’re just working on your mantel, there are a ton of options for trim that you could use to add even more impact once you build it up. Wishing you luck! I’m sure it will look beautiful!!!

  4. Tiffany says

    This looks gorgeous, Kristi! I’d love to work more with wood, but I’ve got to build up my collection of power tools (the first thing I’ve done with the blog that I won’t have to cajole my husband into doing). ;0) I’m pinning this for future reference. Good luck with the rest of this room! I can’t wait to see it complete!

    • Kristi says

      Awwww, thank you SO much Pia! I couldn’t be happier with how it turned out and can’t wait to see how it looks in our finished room!

    • Kristi says

      Thanks so much Amy! The final measurements were: 54″ wide, 49.5″ tall & 6.5″ deep (with 2″ sticking out on either side with the mantel). Hope this helps!

  5. JaneEllen says

    BRAVO AND THEN SOME, what a beautiful job your hubs did. Isn’t it wonderful to have talented and knowledgeable hubs. It looks fantastic. Wish we had room for one in our room.
    Happy week

    • Kristi says

      Thank you SO, SO much JaneEllen! I’m absolutely thrilled with how it turned out and cannot wait to see it in our new master bedroom! Wishing you a wonderful week as well!

  6. Paula says

    Hi! Thanks so much for the great idea and the detailed “recipe”. We are in the middle if assembly right now and I’m a bit unsure how the 1×2’s attach to the back. Can you draw me a sketch or anything? I can’t quite tell from the pictures what is what and what exactly I’m looking at. So excited to finish this for the holidays!!

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