Photo Source: Summerhill

Photo Source: Summerhill

9.36.2.10. (11) Interior walls that meet exterior walls or ceilings whose plane or airtightness is on the interior of the building envelope and knee walls that separate conditioned space from unconditioned space shall be constructed airtight by

a) sealing all junctions between the structural components,

b) covering the structural components with an air barrier material and sealing it to the adjacent air barrier material, or

c) maintaining the continuity of the air barrier system above or through the interior wall or below or through the knee wall, as applicable.