Subtopic 3.1005 Other Ceiling Materials

Tongue and groove ceilings sealed to prevent air leakage and moisture movement between the attic and conditioned space

Maintain the integrity of the glazing system as part of a continuous thermal boundary Thermal boundary The separation between the interior and exterior environments of a building that slows heat flow between the conditioned space and unconditioned space to prescribed R-values

Configuration of complex ceiling planes will be simplified by spanning interior soffits, chases, direct penetrations, and other cavities to provide a continuously sealed air barrier Air barrier The separation between the interior and exterior environments of a building that slows air flow to the point that no smoke movement is visible at 50 pascals of pressure difference across the boundary between unconditioned attic and conditioned space