A custom fire pit is a significant investment in your home’s outdoor living space. Like any investment, it requires care to retain its value and beauty. While professional hardscaping is built to last, the elements—especially in four-season climates—can take a toll. Here is the maintenance advice that every fire pit contractor wishes their clients would follow to keep their fire features looking brand new for decades.
Managing Moisture: The Universal Enemy Whether you have a wood or gas pit, water is the primary concern. In the winter, moisture that gets into the pores of the stone can freeze and expand, leading to spalling (flaking) or cracking. Your fire pit contractor will likely recommend sealing the stone every 2 to 3 years. A high-quality, breathable masonry sealer repels water while allowing trapped moisture to escape. This prevents stains from leaves or ash and protects the structural integrity of the block. Additionally, keeping the drain clear is vital. If your wood-burning pit has a drain at the bottom, make sure it isn’t clogged with compacted ash or debris. If water pools in the pit and freezes, it can exert enough outward pressure to crack the masonry walls.
Wood-Burning Specifics: Ash and Heat For wood-burning pits, ash management is key. Ash is acidic. If left to sit in the bottom of the pit, it can mix with rainwater to create a sludge that eats away at mortar joints and metal grates. A fire pit contractor advises cleaning out the cold ash regularly—ideally after every few burns. You should also inspect the firebrick or steel liner. These components take the brunt of the heat. Over time, hairline cracks may appear in the mortar of the firebrick. Small cracks are normal, but if bricks become loose, they need to be repointed. Using a steel grate to elevate the logs can also help; it improves airflow for a better burn and keeps the intense heat slightly away from the floor of the pit.
Gas Fire Pit Care: Burners and Media Gas fire pits require a different maintenance approach. The burner assembly is made of metal (usually stainless steel or brass), and while it is rust-resistant, it is not rust-proof. Keep the burner clean. If the small portholes get clogged with debris or spider webs (spiders love the smell of propane), the flame pattern will be uneven. Your fire pit contractor will tell you to keep the decorative media (lava rock or glass) clean. Over time, soot can build up on the rocks. You can usually remove the rocks and wash them with soapy water, letting them dry completely before putting them back. Crucially, cover the burner when not in use. A custom metal cover protects the delicate ignition components and gas jets from rain, snow, and nesting insects.
Winterizing Your Fire Pit In regions like Iowa, preparing for winter is essential. If you have a gas pit and don’t plan to use it during the coldest months, shut off the gas supply at the source (the house or the tank). If the system has electronic ignition components, you might want to remove the batteries or cover the module to prevent corrosion. For both types, a heavy-duty canvas or vinyl cover is a good idea. However, ensure the cover is breathable or remove it periodically on sunny days to prevent condensation from building up underneath, which can cause mildew or efflorescence (white powdery deposits) on the stone.
When to Call the Pro While homeowners can handle cleaning and sealing, some issues require a fire pit contractor. If you smell gas, hear a hissing sound when the unit is off, or notice the flame height has dropped significantly, call a professional immediately. Structural issues, like a shifting foundation or large cracks in the outer wall, also require professional repair to ensure the unit remains safe. By following these simple maintenance steps, you honor the craftsmanship that went into your fire pit and ensure it remains the warm, inviting heart of your backyard.
