Other rocks that are safe to use around and in your fire pit include fire rate brick lava glass lava rocks and poured concrete.
Building a fire pit with natural rocks.
If you do not have access to fieldstone many garden and landscape design centers sell rocks which are perfectly suited for lining the perimeter of a fire pit.
If the circle is more than an inch or two uneven remove the higher bricks and dig out the dirt underneath until they re level with the rest.
Continue building the wall of the fire pit by alternating layers of face stone and fire brick until desired height is reached.
Especially when great professionally made fire pits are available for purchase on the internet.
Flatter and roughly rectangular shaped rocks are easiest to stack but rounded rock can be used to build the low stone walls of the fire pit.
Keep the excavated area level as you work.
If you have rocks in or around your fire pit be cautious when lighting fires after it has rained.
Overlaid stone diy fire pit.
However if i still haven t talked you out of it at least be careful when obtaining the river rocks and building your fire pit.
When selecting and building your diy fire pit make sure you avoid using wet stones.
Apply a bed of mortar on top of the previous layer of stone or fire brick and then set stones and bricks.
If you are building your stone fire pit on top of an existing backyard patio cement the first layer of blocks onto the patio to prevent shifting.
Using a level make sure the bricks are relatively even all the way around.
Flagstone and crushed stone are ideal materials for the fire pit cap and the stones in the center of the pit respectively.
If you re wondering how to build a fire pit we ll show you how.
If you are using river rocks be sure to give them several days of direct sunlight to properly dry.
Pack the dirt solidly all the way around with a hand tamper.
Avoid wall weakness by staggering the joints between previous and subsequent layers of stone and brick.
Snag my book.
Air and water permeable rocks are much more likely to explode than dense non permeable rocks.
This is because air or water is absorbed by the rock when it is cool and then the air or water molecules trapped inside the rock expand faster than the solid rock when it heats up next to the fire.
And if your fire pit decides to explode don t say i didn t tell you.
This is one area where you can use lava rocks for fire pit safety.