Although it is on the higher end of the price tag, fire pit glass can withstand extreme temperatures, and the chance of the glass exploding is virtually zero. Firepit glass comes in various shapes, colors, and sizes, meaning you can find the perfect type to fit your fire pit style. You can layer fireplace glass rocks with logs for a larger flame. Dirtĭirt is a cost-effective material to use for the bottom of your fire pit. While dirt is readily available and easy to obtain, its heat resistance is not comparable to that of fire pit glass, sand, and lava rock. Dirt must be replaced or refilled in the fire pit regularly to ensure the pit is up to par to contain the fire.Įven though it doesn’t hold the same heat resistance as other materials, dirt is an easy and inexpensive way to line the bottom of your fire pit. Just as particular rock types make an excellent bottom for a fire pit, other rock types should not be used. These rock types are typically softer and have a porous makeup allowing liquid to seep into them. When you mix extreme heat with soft, liquid-filled rock, it can explode, causing a potential hazard to those sitting around the fire. Limestone is composed of small fossils and shell fragments and contains calcite and dolomite. The porous nature of gravel makes it crumble easily and become susceptible to liquid penetration. If gravel meets extreme heat, it is likely to explode because of the soft, porous makeup. While river rock contains an aesthetically pleasing appearance, they are not the ideal rock for the bed of a fire pit. River rocks have smooth, rounded edges as a result of the gushing waters of the river from lying in the river bed for years.īecause of years of water erosion that forms these rocks, they are likely to contain water. When the water-filled rocks are met with extreme heat, they can explode and become very dangerous for anyone nearby. Pumice stone has a porous texture and is light with fragile construction. Because the porous texture results in a fragile stone, pumice is likely to hold air and water pockets if exposed to outdoor elements. When these pockets are met with the heat of the fire, it can result in exploding rocks. ![]() Therefore, a pumice stone fire pit is not a good idea. ![]() Natural RocksĪs with the previously stated rock types to avoid using in a fire pit, natural rock has the same consistency. The softness of natural rock is susceptible to the absorption of water and other natural elements. Using a rock type that contains liquid is not ideal for fire pits because the heat causes them to pop. Pebbles in a fire pit are another option you should avoid.
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