Soil Gas Retarders
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- Any seams in soil gas retarder membranes must be overlapped at least 12 inches and sealed in a permanent air tight manner using compatible glues.
- The membrane must also be sealed around interior piers and to the inside of exterior walls with furring strips and compatible glues.
- The sheeting should cover the entire floor area with separate sections of sheeting overlapped at least 12 inches.
- The sheeting should fit closely around any pipe, wire or other penetrations of the material.
- All punctures or tears in the material should be sealed or covered with additional sheeting.
- 422.160(e)(3)