Naturally fire-retardant brick or stucco walls meet or exceed one-hour fire ratings, depending on their thickness. While both noncombustible materials tend to be on the pricey side, they can offer decades' worth of protection if installed and maintained properly. A layer of gypsum, which is 22 percent chemically combined water, underneath will slow the transference of heat from the siding to your framing. About $6 to 8 per square foot for stucco, $8 to $12 for brick. Portland Cement Association and The Brick Industry
Ask TOH users about Safety & Prevention

Contribute to This Story Below