How To Make A Fire Pit With Lava Rocks. Make sure each brick is sound in placement. Red lava rock is placed in the fire pit with only 4 inches of space from the top.

Finish off your fire pit project by spreading the remaining river rock in the bottom of the pit to help with drainage and to reduce weed growth. How to choose the best rock for fire pit. I made a barbell this summer from concrete mix and it had a lot of small stones in it.

Finish off your fire pit project by spreading the remaining river rock in the bottom of the pit to help with drainage and to reduce weed growth.

Pretty basic, but you can experiment with the design to your heart's content. So that's how i made my secret backyard fire pit. Make sure the area is level before replacing stones. I used the lava rock that you use in a barbeque and never had a problem?