Cement Board MD Finish System is applied over approved sheathing substrates in residential and low-rise commercial applications when continuous insulation is not required. The exterior cement board meeting ASTM C 1325 (by others) and fasteners (by others) are applied over Dryvit MD Spacers™ (drainage medium), Dryvit Backstop® NT™ or other code approved water-resistive barrier and approved exterior sheathing.
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