Some materials like hard rock, gravel, or sand weren’t meant to reach high temperatures and can spark and explode if your fire gets too hot. Instead, use lava rocks for your fire pit or lava glass beads as a filler for your fire pit. They are a safe way to create drainage and make your fire pit look nice.
Why do you put lava rock in a fire pit?
When a gas fire pit is lit, the gas fuels the flame on the surface by moving through gaps in the fire pit rock. … The natural insulating qualities of lava rock allow it to shield the burner from the intense heat up top, making it last longer and perform better over time.
How long do lava rocks last in a fire pit?
Lava rocks should last for around two years before they start to show signs of wear. Keep using them in your fire pit until you notice them getting a little crumbly looking.
Should I put lava rocks in my wood fire pit?
Fire Pit Safety
If burning wood, place a layer of lava rock at least 4-5 inches deep. Then place your firewood on the lava rock. For gas fires, fill the fire pit with enough lava rock to at least cover the fire ring. Do not use rock or gravel of any kind in place of lava rock; it can potentially explode when heated.
What happens if lava rocks get wet?
Lava rocks are porous like a sponge. If the rocks are wet, water can get trapped inside of them. When you heat the lava rock up, the water turns to steam. … This expansion of the water can break open the lava rock making it explode.
What can I do with old lava rocks?
3 Uses for Lava Rock – Or Just Rent a Dumpster!
- Build a fire pit: Many DIYers suggest lava rock can be used when building an outdoor firepit. …
- Use lava rock for drainage in a flowerpot. …
- Hack a gas grill and make it feel like charcoal.