Of all possible construction systems, masonry offers the utmost protection against fire. Masonry materials—brick, concrete block, stone, mortar, grout and tile—don’t burn, and therefore don’t contribute fuel to a fire. Masonry maintains its structural integrity at high temperatures, and heat transfers slowly through its mass. Depending on its configuration, a masonry wall can remain intact and contain a fire burning on one side for two, three, four hours or even longer.

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