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Fire place mantel - hollow version to fit over warped original

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Forum topic by The__Dude posted 01-05-2016 04:04 AM 743 views 0 times favorited 9 replies Add to Favorites Watch
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The__Dude

125 posts in 523 days


01-05-2016 04:04 AM

Topic tags/keywords: mantel rough box

Current fireplace has a 3” thick slab of wood. It is rough cut and warped and twisted.

I was thinking of building a “box” that would slide over the warped mantel.
I would plane/shim the existing mantel to create a flat level surface for attachment.

See my sketches.

I was thinking of purchasing rough saw 1” stock. Hand plane to give it a rustic look.


9 replies so far

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clin

510 posts in 457 days


#1 posted 01-05-2016 04:21 AM

It’s common to mount a mantle using a cleat. Seems to me like your going to turn your old mantle into a cleat. Should work fine.

Though I’d make sure the old mantel is securely mounted. Depending on how it is mounted, it could be better to remove it, and mount a cleat specific for the job. But if the old one is secure, sounds like a great idea to me.

-- Clin

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The__Dude

125 posts in 523 days


#2 posted 01-05-2016 01:26 PM

It is secured and there is rough cut stone cemented around it.

Also was planning on floating the box so I can clear the various protrusions of rock.

Now I need to figure out how to join rough sawn boards.
I supposed to need to hand plate the joint areas flat.

View Kazooman's profile

Kazooman

624 posts in 1413 days


#3 posted 01-05-2016 02:54 PM

We did just what you are suggesting to our fireplace when we remodeled. The exising mantel was a rough sawn barn beam. We capped it with a custom made maple box to give it a more modern look and to match the new hardwood flooring. The fireplace is made of very large stones so there was a very uneven edge. The box was simply scribed and shaped to fit the surface. The joint was set in mortar that matches the original and the seam disappeared.

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The__Dude

125 posts in 523 days


#4 posted 02-09-2016 04:01 AM

I have the box all built and I am now applying the finish.
Will post some before/after when I mount it.

View gfadvm's profile

gfadvm

14940 posts in 2151 days


#5 posted 02-11-2016 01:05 AM

That is exactly why I am hesitant to cut 3” thick mantle beams: they always seem to warp. twist, and crack. Your fix looks like a winner.

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

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The__Dude

125 posts in 523 days


#6 posted 02-13-2016 04:05 PM

This was my first project.

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The__Dude

125 posts in 523 days


#7 posted 02-14-2016 08:36 PM


View Kazooman's profile

Kazooman

624 posts in 1413 days


#8 posted 02-14-2016 09:02 PM

Hey Dude!

That turned out really great. Especially for a first project. You should be very proud of the result.

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The__Dude

125 posts in 523 days


#9 posted 02-18-2016 12:33 AM

I just used some coats of wipe on poly.
The color is the natural wood

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