A conduit or pipe penetrates a concrete slab cast over a twenty-mil Drago Wrap soil gas barrier. The barrier is sandwiched between two layers of twelve-ounce non-woven geotextile atop four inches of drainage rock. A Drago Wrap pipe boot seals the penetration at the slab surface, secured with Drago Seal taped seams. The assembly requires a minimum sixteen-inch clearance for the penetration through the drainage layer.
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