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Why is concrete fire pits cracked? 

Reasons and Solutions

Concrete is non-inflammable, making it the perfect material for designing fire pits. Now concrete fire pits are available in a large variety of designs and sizes to give your homes an elegant and aesthetic look. But do concrete fire pits crack? No, under normal circumstances, these fire pits don’t crack. But when concrete withstands the high temperature constantly, it would cause a potential crack. If you have bought a new concrete fire pit or any observing any damage to your concrete, read the article until the end to know why concrete fire pits cracked, its reasons, and Solutions.

Why is concrete fire pits cracked?

Concrete is non-inflammable material that doesn't catch on fire easily. But it will start to burn when something flammable, including gasoline, plastic, or other fluids, covers it. However, it is completely non-combustible, which makes it the perfect choice to withstand fire for a long time.
Movement of concrete material
One of the main features of concrete is its movement that cannot capture by the naked eye. But concrete material shrinks and shifts at a minute level that causes the actual crack. And the main reason for this movement is thermal expansion and contraction. When concrete is exposed to the highest temperature, like fire, it starts to move and crack. But the good news is that you can now resolve concrete cracking issues independently.

How to prevent concrete from cracking

There are various solutions to prevent your patio concrete from cracking and damaging. All you need is to shield the concrete from direct fire exposure. However, let's know the other most significant ways to prevent concrete fire pits.
⦁ Install above-ground fire pits and shield them with fire retardant mats
One of the best ways to prevent substantial damage is to install your above-ground fire pits and then use fire-retardant mats to protect them from high temperatures. This way, your patio’s concrete doesn’t get direct exposure to the fire and doesn’t burn to crack. Heat retardant mats are easily available in the market at affordable prices. It prevents your concrete from being damaged and makes your clean-up process easy and quick after you have a fire as you don't need to collect Ash. Further, it will prevent fire from reaching the concrete at any point. Further, using these mats also keeps a certain area of your concrete from getting extra heat. It would be best if you moved the pit at least once in a while to make your concrete look perfect for several years.

⦁ Add fire resistant barrier or additives to prevent concrete cracking
Permanent fire pits commonly cause concrete to crack in a brief time. It indicates that you may need to replace the concrete every year. Various additives in the market can be incorporated into your concrete to prevent premature damage. You can also use fire-resistant barriers like a rock between your pit and the crack. Further, you should consult with a concrete expert to find the best solutions and options to prevent concrete from cracking during installation.

⦁ Good mix designs of concrete
 Concrete shrinking that cause crack can fix with a good mix of concrete designs. Use significant ingredients and mix them properly. It will help to produce strong concrete that can’t crack easily. Further, design substantial pieces with the control joints to avoid gaps and weak spots. It will create a strengthening concrete work that will go longer with your fire pits.
 ⦁ Add little fire
 Another significant way to prevent your concrete surface from being cracked is to add little fire. The more wood, fuel or gasoline you add, the more intense fire you are going to get. The small fire still give you the adequate warm and heat without damaging your surface.

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Another solution to prevent fire pits from cracked

Install fire pit on a stable surface
Installing a fire pit is on a perfectly stable area is very important for some safety considerations. Because when concrete is recovering, it starts to move (shrink and shift) on a microscopic level, making it crack promptly. So have a concrete, completely level in the area, whether a fire bowl, floor slab or some walk.
Regularly clean the fire pit area
Ash will not damage the concrete, but you should clear the area by regular sweeping to prevent any damage. Further, it would be best if you did a power washing at least once a month.
Don’t put close any flammable material to the fire pit
Don’t put flammable objects like wood, plant, or chemicals too close to your fire pit. Further, don't install a fire pit close to your home for some safety measures.

Does portable fire pit also damage concrete?

Portable pits can also damage your concrete patio unless you take special measures. Portable fire pits can exploit temperatures up to 2000 degrees Fahrenheit. If your fire pit is 6’’ on the ground, there are chances that the temperature will be over 1000 degrees on the concrete surface when the fire is at its hottest. Further, you can also move your portable fire pit around to the same exposure concrete area to avoid the cracking of large concrete surface. One the other hand, people don’t want to move their concrete fire patio due to the design, size and look of the home, then they can follow above-mentioned ways to ensure the safety of concrete surface.

Final Verdict 

In short, concrete fire pit doesn’t crack with normal temperature and fire. But ensure the strength of concrete you are using that it is created with the solid and original ingredients and accurately proportioned. Install above ground fire pit, add fire-resistance mat, bricks, add any barrier between the fire and concrete or ignite little fire to prevent your concrete from being cracked. Further, take special measures to ensure the long-lasting durability of your concrete surface. Here we provide you the each possible reason why concrete fire pits cracked? And give significant solutions to ensure your concrete patio last longer. So, follow above-mentioned ways to prevent concrete from worst cracks.

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Frequently Asked Questions

Q. Why is my fire pit concrete cracking?
Concrete is non-inflammable material that doesn't catch on fire easily. But it will start to burn when something flammable, including gasoline, plastic, or other fluids, covers it. So, when concrete surface is exposed to high temperature constantly, it will more likely going to damage.
Q. Do concrete fire pit crack?
No, in normal circumstances, concrete fire pit doesn’t not crack. But when you add higher amount of fuel, wood or gasoline, the fire get intense that damage concrete surface.
Q. How to prevent concrete from being cracking?
Install above ground fire pit, add fire-resistance mat, bricks, add any barrier between the fire and concrete or ignite little fire to prevent your concrete from being cracked. Further, take special measures to ensure the long-lasting durability of your concrete surface. 
Q. Do portable concrete fire pit get damage?
Portable pits can also damage your concrete patio unless you take special measures. Portable fire pits can exploit temperatures up to 2000 degrees Fahrenheit. But you can also your portable fire pit around to the same exposure concrete area to avoid the cracking of large concrete surface