2.0403.2a
Material Integrity Care will be taken to prevent punctures during installation
Protect ground moisture barrier from damage during other crawl space work
2.0403.2b
Coverage 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
and ground moisture barrier, covering 100% of the exposed crawl space floor, will be installed and sealed to the wall's air and moisture barrier in accordance with
ASTM
ASTM
ASTM International, www.astm.org
E1643 and manufacturer's recommendations
Ground moisture barrier will be fastened to ground in accordance with manufacturer's recommendations and extend a minimum of 6 inches up the foundation wall
Reduce ground moisture entering the crawl space
Create a continuous and durable connection between the wall and ground air and moisture barriers
2.0403.2c
Material specification A ground moisture barrier with a rating of no more than 0.1 perm will be used
A ground moisture barrier will be used that meets tear and puncture resistance standard
ASTM
ASTM
ASTM International, www.astm.org
E1745
Homeowner will be advised that all plastic is biodegradable and will have a life span much shorter than the home (5 years), and it will need replacing to remain effective
Reduce ground vapor entering the crawl space
Ensure crawl space is accessible for service and maintenance without destroying the integrity of the moisture barrier
2.0403.2d
Overlap seams When seams exist, they will be overlapped a minimum of 12" with
reverse or upslope lapping technique
Reverse or upslope lapping technique
Upper course laps under a lower course to keep the moisture under the barrier
For wall to floor connection, the wall moisture barrier will be installed under the ground moisture barrier
Keep water under the liner
2.0403.2e
Fastening
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
and ground moisture barrier will be fastened to the ground to prevent movement in accordance with
ASTM
ASTM
ASTM International, www.astm.org
E1643 and manufacturer's recommendations
Prevent movement and uplift of 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
and ground moisture barrier
2.0403.2f
Sealing seams A durable sealant compatible 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
and ground moisture barrier will be used
Maintain continuous
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
and ground moisture barrier
2.0403.2g
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
, ground moisture barrier penetrations, including fastener penetrations A durable sealant, compatible 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
and ground moisture barrier, will be used
Physical attachments will be provided where practical (e.g., masonry columns, footings)
Maintain continuous
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
and ground moisture barrier
2.0403.2h
Drainage 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
and ground moisture barrier will not interfere with the established drainage pattern
Ensure proper drainage
2.0403.2i
Drainage points Interior drainage collection points will be accessible from above and below 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
and ground moisture barrier
Remove water above and below 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
and ground moisture barrier