New insulation that is not designed to also serve as an
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
will not be added until all air sealing has been completed Existing insulation will be inspected to confirm that it is not concealing
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
weaknesses, and is in full contact and alignment with the
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
Where the insulation is disturbed or found not to be in contact with the
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
, it will be reinstalled to be in contact with the
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
; if it cannot be reinstalled or if its condition compromises its effectiveness, the insulation will be removed Insulation will be marked for depth a minimum of every 300 square feet of attic area with measurement beginning at the
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
All electrical junctions will be flagged to be seen above the level of the insulation Covers will be installed on open electrical junction boxes Insulation dams and enclosures (e.g., can lights, sprinkler systems, access hatch, chimney) will be installed as required Where loose fill or batt insulation is used, it will have a maximum 25 flame spread/50 smoke-developed index when tested to
ASTM
ASTM
ASTM International, www.astm.org
E84 or
UL
UL
Underwriters Laboratories
723 Where rigid foam plastics are used, in no case will the final thickness exceed the manufacturer's tested thickness used to determine the maximum 75 flame spread and 450 smoke-developed index when tested to
ASTM
ASTM
ASTM International, www.astm.org
E84 or
UL
UL
Underwriters Laboratories
723 Foam will be provided with ignition and thermal boundaries as required by code | Minimize potential for warm, moist air to enter the attic and condense on cold surfaces Ensure proper performance of insulation Verify uniformity of insulation material Provide location of electrical junctions for future servicing Prevent an electrical hazard |