how to build a safe firepit

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Qqueen
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how to build a safe firepit

Postby Qqueen » Wed Dec 18, 2013 5:11 am

I want to build a custom fire pit in my backyard but I have heard that there are some stones which explode when heated. Is there anyone who can give me a list of stone types to avoid when building a fire pit? It must be safe because I have kids around.
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Re: how to build a safe firepit

Postby jtilk » Wed Dec 18, 2013 6:52 pm

:dont: just avoid the ones packed with explosives :laughing7:
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MinneSmoka
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Re: how to build a safe firepit

Postby MinneSmoka » Fri Dec 27, 2013 3:35 pm

I made a temporary campfire ring from a some wet river rock and after it got hot enough a couple cracked and popped. Some rocks are porous (lava rock) and can have moisture in them, when hot enough I think it's the internal steam that splits them. It didn't really explode but I suppose some shards could fly.
Lava rock that is thoroughly soaked shouldn't be used until dried out. So I've been told.
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Re: how to build a safe firepit

Postby DATsBBQ » Fri Dec 27, 2013 5:06 pm

Line it with fire-bricks. You can get them at places that sell wood stoves. Conversely you could use cinder blocks but they will crack over time.
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Re: how to build a safe firepit

Postby Boots » Fri Dec 27, 2013 10:35 pm

Lined w firebricks is right, but they also make a fireproof or fire resistant mortar. The regular mortar will break down under the heat over time. I think it is called refractory mortar.

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Re: how to build a safe firepit

Postby esugrad97 » Mon Jan 06, 2014 3:10 pm

I built one, this past spring, and I just used limestone that I picked up along the side of country roads. I live in Kansas, though, so it's pretty easy to find.
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Re: how to build a safe firepit

Postby dub' » Wed Jan 08, 2014 1:40 pm

If you use firebrick make sure it stays dry.
Water will flat ruin firebrick in short time.

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