All Things Gypsum<br>You’re Covered on Quality With Gypsum Sheathing
The many benefits of gypsum sheathing is Walker's topic this month.
The natural non-combustible core of gypsum sheathing protects the framing from the hazards of fires that may occur outside the building, even when the siding material is combustible. When exposed to high temperatures, chemically combined water in the gypsum is gradually released, providing protection until all of this water is completely driven off. In addition to its fire-resistance properties, gypsum sheathing has a low flame spread rating of less than 25 (tested in accordance with ASTM E 84 or CAN/ULC-S102). Where fire-rated and/or sound control systems are needed, the applicable test report should be reviewed for complete information on systems and component rating. Specific system details are available in the Gypsum Association’s Fire Resistance Design Manual (GA-600-00).