Fiberglass Batt Foil Flame Spread Rated Installation

There are two types of flame spread rated batts, unfaced and foil faced.  Unfaced batts are commonly used in commercial buildings in exterior walls covered with drywall, mechanically secured to a roof deck when an acoustical ceiling is installed below the roof, and for sound control laid on top of an acoustical ceiling.

The foil faced flame spread rated batt is used in an exterior wall or ceiling that is not going to be covered with drywall.