The NFPA recommends covering the floor beneath the stove with No. 24 gage or thicker sheet metal. Metal with asbestos backing and asbestos millboard can also be used. If slate, brick, etc. are used, they must be mortared in place with no gaps. A 2-inch layer of sand or ashes laid in the bottom of the stove will also help prevent overheating of the floor. The materials used to protect the floor should extend 12 inches beyond the sides of the stove without openings and 18 inches beyond the side with the door or other potential openings.
Clearances far stove and stovepipe from walls and floor.
Other Combustibles Other combustible materials such as firewood, paper, curtains, and plastics should be kept at least 36 inches from the stove. Stovepipes Like fireplaces, wood-burning stoves must be vented to the outside of the building. A stovepipe is used to connect the stove to a masonry chimney or prefabricated metal chimney. The stovepipe is sometimes referred to as a connector. If the stovepipe diameter is over 10 inches, a heavier gage metal must be used.