4.1003.14 Accessible Unvented Flat Roof with or without Existing Insulation

An occupant safety plan will be prepared and implemented

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

Code compliant ventilation will be installed before insulation