Answer:
Board with glass fibres in the core provides better fire resistance than gypsum board without glass fibres. The fire resistance of wall assemblies with regular (standard) gypsum board increases as the density of the gypsum board increases. Layering the number of gypsum board on each side of the assembly from one to two improves the fire resistance rating. Well constructed and tested gypsum board wall assemblies offer a first line of defense against the spread of fire and lead to a more sustainable building.
