Tempo:
Roofs It is common to install the ceiling air barrier before the interior partitions are built, because it is easier to make an airtight connection between the wall top plates and unconditioned spaces (such as attics). Alternatively, when the interior
partitions are built before the ceiling air barrier is installed, the top and ends of the interior partitions should be covered with strips of polyethylene or polyolefin at least 450 mm (18 in.) wide (Figure 12), which are subsequently lapped and sealed to the wall and ceiling air barrier materials.
12 Polyethylene strips at end of partition and over wall top plates to provide continuity of the air barrier
top plate of stud partition keyed into exterior wall
‘house-wrap’ AB tab over top plates of interior and exterior stud walls below roof
polyethylene VB tab between interior and exterior stud walls
partitions are built before the ceiling air barrier is installed, the top and ends of the interior partitions should be covered with strips of polyethylene or polyolefin at least 450 mm (18 in.) wide (Figure 12), which are subsequently lapped and sealed to the wall and ceiling air barrier materials.
12 Polyethylene strips at end of partition and over wall top plates to provide continuity of the air barrier
top plate of stud partition keyed into exterior wall
‘house-wrap’ AB tab over top plates of interior and exterior stud walls below roof
polyethylene VB tab between interior and exterior stud walls
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