Fire-retardant treated plywood is used where the Ontario Building code requires this type of plywood as part of a rated assembly for fire separation in construction. sheathing grade plywood treated with Driconยฎ fire retardant. Driconยฎ is the recognized leader in fire-retardant protection and has been specified by architects and engineers for decades. The Driconยฎ process utilizes hygroscopic salt compounds which …
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