Using a Chiminea Indoors Chiminesas can bring warmth and ambiance to your backyard. It can also be used for cooking and is more secure than an open fire pit. Chimineas made of clay require a layer of sand at the bottom to stop thermal cracking due to abrupt temperature fluctuations. https://stovesuk98531.bloggazza.com/29220196/11-ways-to-totally-block-your-chiminea-fire-pit