I want to build a fire pit with concrete blocks from Lowes. They sell a kit for $200 that includes 3 rows of pavers and a metal (black paint coated) fire ring https://www.lowes.com/pd/43-5-in-W-x-43-5-in-L-Ashland-Concrete-Firepit-Kit/4686367. This fire ring accounts for $100 of the overall price, and is only about 4 or 5 inches high and is designed to prevent the heat from the fire from cracking the top 4-5 inches of concrete block.
I'd rather buy the concrete block forms and arrange the circular pit, and line it with something cheaper. I also know that the Lowes ring would rust out within a few months. Would lining the pit with galvanized sheet metal provide enough of a shield to keep the block from getting too hot? Or would this be a wasted effort?
I'd rather buy the concrete block forms and arrange the circular pit, and line it with something cheaper. I also know that the Lowes ring would rust out within a few months. Would lining the pit with galvanized sheet metal provide enough of a shield to keep the block from getting too hot? Or would this be a wasted effort?