The 2006 International Building Code requires the installation of an approved thermal barrier over all foam plastics separating the foam insulation from the interior space of the building.This includes spray foam insulation. The code specifically lists 1/2" gypsum wallboard as an acceptable thermal barrier material. However, most recently new technology has emerged for more cost effective thermal barrier solutions such as a spray applied intumescent coating. Icynene has tested and qualified an intumescent coating, DC-315 as an approved spray applied thermal barrier over our LD-C-50™ and MD-C-200™. This provides architects, designers, and commercial building owners with a cost effective option for exposed applications such as acoustical ceiling plenums, exposed roof assemblies, and attics connected to habitable space.