Used to collect radon, moisture and other toxic vapors coming from the soil
around a house or building and direct them toward an exhaust stack, which leads
them safely out through the roof.It works effectively as part of a passive
soil depressurization system (PSD) or a fan can be added to the exhaust stack
for an active soil depressurization system (ASD).
0.4" thickness also available in rolls that are 4' (48") wide x 50' (600")
long, follow link to Item #66105