Large Clay Chimineas For Sale Chimineas made of clay need to be protected from the elements. If left exposed to cold and rain a chiminea made of clay can become softer or crack. Chimineas that are frequently used should be filled with 50mm of sand or Gardeco Lava stones (see https://fireplacesusa44208.kylieblog.com/30353717/17-signs-that-you-work-with-biggest-chiminea