4.1301.11a
Sealing between conditioned space and crawl space will be completed before insulating work begins
Ensure airtight
envelope
Envelope
The separation between the interior and exterior environments of a building that includes a combination of air and thermal barrier
Prevent leakage
4.1301.11b
Insulation will be cut as necessary to fit between the floor joists and installed in contact with subfloor without gaps, voids, compressions, misalignments, or wind intrusions
If Kraft-faced batts are used, they will be installed with Kraft facing to subfloor
Insulation will be installed to prescribed R-value
Insulate to prescribed R-value
4.1301.11c
Batts will be secured with physical fasteners
Ensure insulation remains in contact with subfloor
4.1301.11d
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
A rigid
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 be mechanically fastened to underside of floor assembly
Seams and penetrations will be sealed
Rigid barrier will be resistant to pests
At minimum, all gaps larger than 1/4" x 1/4" will be stuffed with copper metal mesh or other rodent-proof material
If rodents can easily get their mouth around corners, they will be reinforced with hardware cloth or metal angle (e.g., gypsum board bead)
Protect insulation
4.1301.11e
A dated receipt signed by the installer will be provided that includes:
Coverage area
Thickness
R-value Document job completion to contract specifications
Confirm amount of insulation installed
Comply with 16 CFR 460.17
