Other rocks that are safe to use around and in your fire pit include fire rate brick lava glass lava rocks and poured concrete.
What bricks should i use for a fire pit.
Hard rocks like granite marble or slate are much denser and therefore less likely to absorb water and explode when exposed to heat.
Never seen or heard of a brick explode outside of reddit but i ve seen years old pits show crumbling.
3 use a trowel to apply the cement to each brick.
Place the metal fire pit bowl down inside the circle of the brick fire pit.
Gap between the firebrick and the face brick.
After building the first ring of face stones set the first row of fire brick.
The outside edge of the fire brick should meet the inner circle marked after digging out the footing but double check by measuring 12 inches back from the face of the first row of stone.
Set the screen on top of the bowl to complete the fire.
The fire brick will form the flame retardant interior wall of the fire pit.
The diameter of the circle should be slightly larger than the outside dimensions of the fire pit ring you re preparing to build.
Of fresh mortar on each course of face brick into place leaving a 1 4 in.
For a square or rectangle fire pit temporarily lay out the first layer of concrete blocks for your design on the ground and check the layout for square.
Start with a bottom row all the way around.
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This is one area where you can use lava rocks for fire pit safety.
Keep in mind that since you are installing brick to a curve it will actually only touch the fire pit kit on it s edges so a substantial amount of cement is necessary in the middle of the brick to compensate for that gap.
For the cost of fire bricks you could build a regular brick stone pit and throw a fire pit liner in there for a fraction of the cost.
Check the level of each course and tap down the bricks as necessary.