Author Topic: What does it take to wall up a fireplace?  (Read 3436 times)

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Offline mrFinpgh

  • Posts: 187
What does it take to wall up a fireplace?
« on: March 12, 2017, 11:35 PM »
In my current dining room, there is a non-functional gas fireplace.   The chimney is capped and the flue is blocked off at the bottom.  The whole thing is brick.

I'd like to remove the tiled hearth and the mantel, and just wall over this whole area.  Not remove the brick, but cover it.  Either with drywall or plaster.

What I'm not clear on is what needs to happen for this to work out. I've done some research on it and I run across a lot of stuff suggesting that I need to put a vent of some sort in there because some moisture or humidity can still accumulate in that space.

Can I just attach drywall to the fireplace and tape it?   Furring strips/tapcons?    expanded metal lath+plaster? 

Are there any code considerations I'm ignoring?

Thanks,
Adam

 

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Offline tjbnwi

  • Posts: 4862
  • Cedar Tucky Indiana
Re: What does it take to wall up a fireplace?
« Reply #1 on: March 12, 2017, 11:42 PM »
As long as the flue is seal as you stated fur then cover the brick and firebox with XPS, seal/tape seams drywall and finish.

Tom

Offline antss

  • Posts: 918
Re: What does it take to wall up a fireplace?
« Reply #2 on: March 12, 2017, 11:44 PM »
muscle  [big grin]

Offline Kev

  • Posts: 7537
Re: What does it take to wall up a fireplace?
« Reply #3 on: March 13, 2017, 03:17 AM »
You want a permanent seal on the gas pipe ... don't leave a tap in there. If you can, best is to get the gas plumbing completely removed !!

Offline Holmz

  • Posts: 3625
Re: What does it take to wall up a fireplace?
« Reply #4 on: March 13, 2017, 03:45 AM »
Depending on the flue and the flashing you may want a vent and/or fan to prevent mould.

Offline mrFinpgh

  • Posts: 187
Re: What does it take to wall up a fireplace?
« Reply #5 on: March 16, 2017, 10:14 PM »
As long as the flue is seal as you stated fur then cover the brick and firebox with XPS, seal/tape seams drywall and finish.

Tom

Thanks, Tom.   Good stuff.  I hadn't even thought about putting insulation on the firebox. 

Thanks,
Adam

Offline mrFinpgh

  • Posts: 187
Re: What does it take to wall up a fireplace?
« Reply #6 on: March 16, 2017, 10:15 PM »
You want a permanent seal on the gas pipe ... don't leave a tap in there. If you can, best is to get the gas plumbing completely removed !!

The pipe is embedded in the concrete.  But, it is disconnected completely from the gas line.   There's about 8" between the line in the basement below and where the pipe ends.

Thanks,
Adam

Offline mrFinpgh

  • Posts: 187
Re: What does it take to wall up a fireplace?
« Reply #7 on: March 16, 2017, 10:16 PM »
Depending on the flue and the flashing you may want a vent and/or fan to prevent mould.

How would I determine whether this would make sense?

Thanks,
Adam

Offline Holmz

  • Posts: 3625
Re: What does it take to wall up a fireplace?
« Reply #8 on: March 17, 2017, 08:39 AM »
Depending on the flue and the flashing you may want a vent and/or fan to prevent mould.

How would I determine whether this would make sense?

Thanks,
Adam

I dunno, but we had a walled up chimney, and mould arrived.
A vent was put in and a lot of work on flashing.

I would put in a fan, even if you never use it. And a vent.
You can always run the fan after rain.

Maybe you could temporarily wall it up and monitor is for moisture and mould?
And then in a few months you would know what to do?

Offline mrFinpgh

  • Posts: 187
Re: What does it take to wall up a fireplace?
« Reply #9 on: March 18, 2017, 10:32 PM »
I'll have to see what my chimney/fireplace guy says about it.   

It won't be inaccessible, so if I need to put a small vent in down the road, that shouldn't be an issue.

Thanks,
Adam

Offline rizzoa13

  • Posts: 532
Re: What does it take to wall up a fireplace?
« Reply #10 on: March 18, 2017, 10:56 PM »
Remove the chimney above the roofline and patch it back in with shingles and then Sheetrock over it.

Offline mrFinpgh

  • Posts: 187
Re: What does it take to wall up a fireplace?
« Reply #11 on: March 18, 2017, 11:53 PM »
No can do.

a. Flat roof w/ membrane covering
b. Chimney is 'shared' with adjoining house.  They probably wouldn't like it if I did that :-)


Offline Cheese

  • Posts: 3000
Re: What does it take to wall up a fireplace?
« Reply #12 on: March 19, 2017, 12:33 AM »
Whoops...I've done the same thing, removed a chimney to reinstall a refrigerator...that's a trade-off worth considering. The gain in square footage is definitely worth the effort.

Offline Kev

  • Posts: 7537
Re: What does it take to wall up a fireplace?
« Reply #13 on: March 19, 2017, 12:35 AM »
As long as the flue is seal as you stated fur then cover the brick and firebox with XPS, seal/tape seams drywall and finish.

Tom

Thanks, Tom.   Good stuff.  I hadn't even thought about putting insulation on the firebox. 

Thanks,
Adam

Good thing .. also remember to block the pipe for insects, vermin, etc.

Offline rizzoa13

  • Posts: 532
Re: What does it take to wall up a fireplace?
« Reply #14 on: March 19, 2017, 02:03 AM »
That's a shame. You should at least then cap your chimney flue from the top so water doesn't make its way in. You can do many different things to cap it, even galzanized sheet stock. Just make sure there's pitch to it to shed water.

I'd block it in and then pour a little concrete crown up top shed the water.

Offline mrFinpgh

  • Posts: 187
Re: What does it take to wall up a fireplace?
« Reply #15 on: March 23, 2017, 01:02 PM »
I had the chimney capped (on my side) last year.  So that should probably be covered.

Thanks, everyone, for your input. 

Best,
Adam


Offline mrFinpgh

  • Posts: 187
Re: What does it take to wall up a fireplace?
« Reply #16 on: April 19, 2017, 08:32 PM »
In case someone else googles for this at some point:

I finally got in touch with the guy who worked on my fireplaces. He said no need for the vent.  That's my situation, though. 

Best,
Adam