Controlling the movement of air between the conditioned interior environment of a building and the exterior is a core function of building science. However, if you ask someone the best method of doing this, you are likely to get dozens of different answers.
The fluid-applied air barrier (FAAB) concept was originally a Canadian-developed technology from more than 40 years ago. Back in the early 1970s, the genesis was an adhesive combining air- and vapor-retarding characteristics—eventually, this material would find its way into building codes.
A proposed ASTM standard will provide building officials and fire marshals with better ways to inspect spray-applied (SFRM) and intumescent (IFRM) fire-resistive materials, commonly used on structural steel and other substrates to maintain veracity and safe conditions when a fire occurs.