Hello new to the forum don't know how many times this has seen asked if a lot sorry. first I got hold of an old cast iron log burner done it up looks nice but I don't know what's the best & cheapest way to insulate the wood floor & the wood wall. I was told to use vermiculite sheet but the price it expensive. I wanted 8ft x 4ft sheet thought of masterboard but was told it was no good hope you all can help thanks
In short, "24 gauge sheet metal installed on spacers 1” from an existing wall" will reduce the required clearance from 36" to 12". Read the whole article for a lot more important info. Unfortunately the page's links to NFPA charts no longer work, so you will have to look those up yourself.