How do you use lava rocks for a wood fire pit?

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.

Should I put lava rocks in my firepit?

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. … Sandstone, river rocks, natural rocks, and gravel are not ideal fill for fire pits because they are more likely to crack or explode under high heat.

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.

How many rocks should be in a fire pit?

Round Flat Gas Fire Pit Inserts

Fire Pit Size Number of Lava Rock (657) Needed
24″ 2 Bags
30″ 2 Bags
36″ 4 Bags
42″ 4 Bags
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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!

  1. Build a fire pit: Many DIYers suggest lava rock can be used when building an outdoor firepit. …
  2. Use lava rock for drainage in a flowerpot. …
  3. Hack a gas grill and make it feel like charcoal.
Tame a raging fire