FireDefender® Mineral Core material fills most of the space in the interior of a door. It is relatively light in density at approximately 32 pounds per cubic foot and is an excellent insulator. It will not, however, provide any screw holding capability. FireDefender mineral cores are made of a proprietary mix of various minerals, fiberglass, and inert binders. They are available in a variety of thicknesses ranging from 1.500 inches to 1.6875 inches (38mm to 43mm) and in various sizes up to a maximum of 34-1/2 inches by 82 inches (876mm x 2083mm). The mineral core is easily sawn with ordinary woodworking equipment and can be pieced together to make doors as large as four feet wide and ten feet tall. Georgia-Pacific mineral core is also approved for use in temperature rise applications in wood fire doors.
For important product fire, safety, and use information, go to gp.com/safetyinfo.
Positive-Pressure Furnace Firedoor TestingLearn the advantages and disadvantages of three different testing approaches used by Georgia-Pacific: