I have a paver patio with a natural gas fire pit made of stone. The bottom of the fire pit is pavers. The burner ring will sit approximately 6" from the pavers, maybe a little more. The pavers were not selected with a fire pit in mind; they could be ideal for heat resistance and fire pits, or they could be normal pavers which crack under temperature changes.
If I fill the pit with fire pit certified lava rock, will that spacing be safe? Will there be enough insulation to protect the pavers? If it will be unsafe, what should be done to mitigate that? Is there a material that will be better than lava rocks?
Some more information:
- Assume that wind is not a big issue - the flames are not tall enough to get over the fire pit walls
- Assume that the material won't erode away (it's kept contained)
- I plan on minimizing exposure to the elements, keeping it covered when not hot/in use
Currently the plan is (bottom to top) pavers, ~6" of lava rock, burner, 2-3" of lava rock. Ultimately, I am wondering if this is safe enough.