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For a natural and rustic look, Fireside Expressions recommends our lava rock for your outdoor fire feature! Our collection is lightweight and porous, allowing fuel and heat to flow throughout your feature, creating a warm and beautiful display for you and your loved ones to enjoy.

Lava rock serves another purpose besides fulfilling your decorating needs: we recommend filling the bottom of your fire feature and then adding a thinner layer of rock on top of your burner to protect it from the flame. This also creates a finished look and a foundation for an additional 1-2" of rock, fire glass, or even a faux log set. (Choose from granules or 1-2" size lava rock in a variety of shades.) 

PLEASE NOTE:

  • Because propane is heavier than natural gas, it will sink to the bottom of your feature. Small pieces of fire glass will not allow propane to circulate, and this can lead to the explosion of this particular media. Even with larger fire glass pieces, there is still not enough room for the gas to dissipate from wind and other factors. Lava rock or our ceramic river rocks allow propane to dissipate and is the safest choice for your gas feature. (In addition, it is always a good idea to incorporate lava rock into the bottom portion of natural gas burning features. This helps with gas dispersion and allows you an affordable way to fill your fire pit or bowl.) 

As always, our team of experts is available at 1-888-986-1535 to help answer your questions!

We recommend covering the burner with a layer of cinders/lava rock. These should be 1" diameter or larger. Glass should then be used as a topping over cinders/lava rock to approximately 2” in depth. This helps save material, money, and allows for safer operation.

For Square or Rectangle Shaped Fire Pits

Calculate how much fire glass you'll need for a square fire feature

* You can use other fire media to fill most of the fire pit, then cover the remaining 2" to 4" with fire glass.

(A) Fire Pit Width:  
 inches
(B) Fire Pit Depth:  
 inches
(C) *Fire Glass Height:  
 inches



 

Total Glass Needed (lbs):

   


For Round or Octagon Fire Pits

Calculate how much fire glass you will need for a round fire feature.

* You can use other fire media to fill most of the fire pit, then cover the remaining 2" to 4" with fire glass.

(A) Fire Pit Inner Diameter:  
 inches
(B) *Fire Glass Height:  
 inches



 

Total Glass Needed (lbs):

   


For Standard Fireboxes

Calculate how much fire glass you'll need for a fireplace.

* 2" to 4" of fire glass is the recommended height for fireplace fireboxes and pan burners.

(A) Firebox Front Width:  
 inches
(B) Firebox Rear Width:  
 inches
(C) *Fire Glass Height:  
 inches
(D) Firebox Depth:  
 inches



 

Total Glass Needed (lbs):