Reddit
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r/DIY on Reddit: Do I need firebricks for a fire pit?
October 17, 2023 -
Okay so I have a 5’ by 5’ square sand patch of land I’m turning into a fire pit
I’m putting down gravel and then paver base. So I’ll have the layers of sand, then 2” of gravel and then 2” of paver base.
I’ll then be building a circular fire pit out of retaining wall blocks that are trapezoid shaped
I’ll leave about a 2” gap all around then in the center I’ll put a fire ring that’s 35”.
I’ve read some say fire bricks are super important.
Should I be incorporating fire bricks or am I fine? If I do need them, would I only put them under the fire ring or under both the fire ring and the circular stone walls?
Top answer 1 of 5
6
Any bricks that can hold moisture have the potential to explode when heated. Not a tnt level explosion but hot shrapnel can cause injury.
2 of 5
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Definitely use fire-rated bricks. Other types will at best crack and fall apart after a few fires. At worst, they'll pop violently and hurt someone.
Question: what bricks/stones to use for a backyard fire pit?
Doesn't matter what you use for the bricks. Do the bricks before the gravel. Don't need firebricks on the inside. Id skip the sand too. More on reddit.com
Do I need firebricks for a fire pit?
Any bricks that can hold moisture have the potential to explode when heated. Not a tnt level explosion but hot shrapnel can cause injury. More on reddit.com
Fire Pit Bricks
Go with the fire bricks. Use a stacked, circular pattern. When you stand next to it, they make a sort of parabolic heat reflector. It's crazy. Also, when stacking, you can leave gaps for added air-flow. More on reddit.com
Can concrete pavers/blocks be used for a fire pit?
I would say yes, but it depends on the block's ability to dissipate moisture. Concrete and grout retain a lot of moisture and can( does) literally explode once steam pressure builds in them faster than it can escape through the porousness of it. Try just building a fire on top of a single spare brick, make a good hot one and see how it handles it. Regardless, I have seen people use large metal bands (tractor tire rims, etc.) On the inside of a fire pit with a layer of sand, gravel, dirt, or even just air and that allows the heat to dissipate enough not to pop or crack bricks. Fire brick is an option, but an expensive and unnecessary one for most outdoor applications. Hope it helps, good luck and post pics. More on reddit.com
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Facebook
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What kind of bricks are available for a fire pit project?
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Family Handyman
familyhandyman.com › home › house & components › parts of house › foundation
How to Build a DIY Brick Fire Pit for Your Yard | Family Handyman
July 7, 2025 - Most require a fire pit to be 25 ft. away from any structures and overhanging trees. Think about how the prevailing winds blow through your backyard. ... 48 in. cardboard concrete form (or for less money substitute a 4x8 sheet of hardboard to make both forms) Five 80-lb. bags of Type N mortar mix · One half-gallon bucket of refractory cement (sold at a brickyard)
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workshop.bunnings.com.au › t5 › Outdoor › What-bricks-can-you-use-for-a-fire-pit › td-p › 152911
What bricks can you use for a fire pit? | Bunnings Workshop community
May 9, 2023 - It's marvellous to have you join us, and thank you for sharing your question about building a fire pit. The Scandia 1kg Air Set Mortar is meant to be used with fire bricks which means that any heat that passes through the mortar will get passed on to the bricks.
BBQ Brethren
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Clay brick vs Firebrick vs Concrete brick | THE BBQ BRETHREN FORUMS
February 9, 2014 - If you use the concrete bricks, cook them a bit, to make sure they do not spall. Just start an open fire and let them heat up and expel air. If there are entrained air pockets, then will crack, better to know that right off.
Land Designs By Colton
landdesignsbycolton.com › brick-fire-pits
Brick Fire Pit DIY Guide - Build Yours in 6 Easy Steps
August 22, 2025 - If you were thinking of using anything else other than fire bricks, like cinder blocks, lava rocks, or concrete blocks, know that these are less functional options when it comes to fireplaces.
The Home Depot
homedepot.com › diy projects & ideas › outdoor living ideas › outdoor decor ideas & projects
How to Make a Fire Pit - The Home Depot
September 7, 2023 - Whether you are building a homemade fire pit out of brick, stone or concrete pavers or using a fire pit kit, you must select a location that is a safe distance from any structures and low hanging trees.
Lux Yard and Homes
luxyardandhomes.com › lux yard and homes › lux yard and homes
How Many Bricks to make a 48 inch Fire Pit (Best Guide)
November 14, 2024 - While a typical fire pit generally requires 50-100 bricks, and a 3-foot diameter pit often uses around 80 face bricks, the exact number always depends on the fire pit's size, shape, and the specific bricks chosen. A great starting point for your 48-inch fire pit project is to establish a solid foundation of knowledge and accurate measurements.
Bluu
bluu.com › home › tips & how-to's › tips & how-to's
How to Build a Fire Pit with Bricks on a Budget: Step-By-Step
November 13, 2022 - The steps can vary slightly depending on what kind of fire pit you want to build. For the most part, however, this is the basis needed to complete a simple, cost-effective fire pit. The first step in how to build a cheap fire pit with bricks is marking out the spot where you are going to build.