When homeowners contemplate the versatility and durability of fire pits, concrete fire pits are a popular choice. Anyone who has or is considering one of these fire pits likely has asked, “Can you burn wood in a concrete fire pit?” Understanding the compatibility and potential risks of burning wood in a concrete fire pit is essential to making use of it. This blog will discuss the functionality of burning wood in a concrete fire pit, providing recommendations, advice, and best practices.
Understanding Concrete Fire Pits:
Concrete fire pits are a preferred choice for many homeowners because of their flexibility, heat-resistance, and customizable design options. Concrete fire pits are created using a blend of cement, water, and aggregates and are perfectly suitable for withstanding heat and being a long-lasting outdoor focal point. These fire pits come in different shapes, sizes, and styles, making them an extraordinary choice for diverse backyard setups. These fire pits do not wear out easily with frequent use, which means they are a good option if you plan to entertain outside often.
Can You Burn Wood in a Concrete Fire Pit?
Yes, you can safely burn wood in a concrete fire pit. Concrete fire pits are designed to handle high temperatures, which makes it a good option for burning wood. However, it is important to make sure the it is built properly and maintained properly so that the heat from burning wood does not damage the concrete. It is also important to use the appropriate wood for a wood-burning fire and to follow the guidelines for safety to enjoy a wood fire in a concrete fire pit.
Risks of Burning Wood in a Concrete Fire Pit:
Cracking:
Cracking is one of the main risks of burning wood in a concrete fire pit. The high temperatures from burning wood in a concrete fire pit can cause the concrete to crack because of thermal expansion and contraction. When concrete is heated, it expands, and when cooled, it contracts. This process repeated through the seasons could lead to pressure within the material which can cause splitting. To prevent this from happening, ensure the concrete is sufficiently cured prior to using the fire pit.
Spalling:
Spalling is when the surface of the concrete begins to flake or peel due to high heat. Spalling can compromise the structural integrity of the fire pit and shorten the longevity of it. The reason spalling occurs is the moisture that was originally in the concrete gets trapped and turns to steam as it heats up which breaks away pieces of the concrete surface. To stop spalling, it is important to avoid using wet or green wood as it can create too much heat and steam, and damage your surface. Make sure the concrete is not exposed to rain or moisture when it’s not being used, as the water can seep into the concrete causing damage over time.
Structural Integrity:
Long-term exposure to high temperatures may damage the structure of concrete fire pits. The repeated cycle of heating and cooling can make the concrete weaken over time, ultimately causing it to degrade. This weakening of the internal structure may result in a potential collapse or failure of the fire pit.
Safety Hazards:
Wood-burning fires present additional safety hazards in concrete fire pits. Uncontrolled fires are dangerous and flying embers and sparks can cause harm to yourself, your property, or a neighbor’s property. To prevent this, it is advisable to use a fire pit cover or spark screen to keep the embers in the fire pit area. Ensure the fire pit is situated a safe distance from combustible construction or shrubbery (e.g., dry leaves, wooden siding, or outdoor furniture) and supervise the fire. Children and pets should be kept away from the fire.
Best Practices for Safely Burning Wood in a Concrete Fire Pit:
Burning wood in a concrete fire pit can be a safe and pleasurable experience, if the right precautions are taken as a way to prevent potential hazards and ensure you enjoy your fire. These guidelines can help ensure you and your loved ones remain safe and have an enjoyable experience.
Use Properly Cured Concrete:
Make sure the concrete that you are burning wood in is fully cured. Newly poured concrete needs time to cure so it can get stronger and you need to allow this time. It is typically recommended to wait at least 28 days for concrete to cure in order to avoid cracking and spalling from heat.
Install a Fire Pit Liner:
Fire pit liners, such as fire bricks or a metal insert, can lessen direct contact between the concrete and the heat. They act as a barrier between the concrete and the heat, which can also help distribute the heat more evenly, protecting the structural integrity of the concrete.
Choose the Right Wood:
Choose seasoned, dry hardwoods like oak, hickory, or maple for your fire pit. These types of wood will burn hotter and more efficiently, produce less smoke, and create fewer sparks. Avoid using green or treated wood, as they will release harmful chemicals and have excessive moisture, potentially causing harm to the concrete.
Control the Fire Size:
It is important to keep the fire size manageable in your concrete fire pit. Larger, roaring fires create a tremendous amount of heat that can exert force on the concrete. Start small, only add wood when necessary, and maintain a moderate and steady flame.
Maintain Safe Distances:
Position combustible materials such as dry leaves, outdoor furniture, and wooden structures a safe distance from the fire pit. Utilize a spark screen or fire pit cover to contain sparks or embers and prevent fire starts where not intended.
Cool Down Gradually:
Allow your fire pit to cool down slowly post fire. Avoid putting out the fire with water, as the change in temperatures could cause thermal cracks in the concrete. Let the fire go out by itself and then cover it up once it is fully cold so that the weathering effects on it are lessened.
Regular Maintenance:
Perform consistent checks and upkeep on your concrete fire pit. Look for small cracks and spalling at the fire pit’s surface that warrant attention. Keep up with minor repairs so the wear from early signs does not progress and collect leftover ash and debris after every use.
To conclude, heat damage can reduce the overall lifespan of a concrete fire pit. Following the precautions listed above, like adding fire pit liners, controlling the fire size, using the appropriate wood and ensuring proper airflow will allow you to enjoy your outdoor evenings for a longer without having to worry about fixing your fire pit.
