- Suction
is created beneath plastic sheeting laid on soil.
- Seams, and edges are sealed to improve vacuum.
TREATING CRAWL SPACES AND OTHER EARTHEN AREAS
Sub-Membrane Depressurization (SMD)
|
|
Membrane
Minimum
of 6 mil (3 mil cross-laminated) polyethylene or equivalent flexible material.
Available in bright white or black.
Areas of high traffic can be protected with carpet scraps or roofing felt
beneath membrane.
Copyright 2000, Great Lakes Center for Occupational & Environmental Safety & Health, School of Public Health, University of Illinois at Chicago