A concrete slab bears directly on an Ultrashield G-1000 top protection course overlying a Liquid Boot Plus sixty mils dry gas vapor barrier and VI-20 geomembrane base course. Below the membrane sits an approximate four inch thick gas permeable aggregate layer bounded at the bottom by a non-woven geotextile. The entire multi-layer assembly rests on a prepared subgrade.
CONCRETE SLAB ULTRASHIELD ™ G-1000 TOP PROTECTION COURSE APPROXIMATE 4" THICK GAS PERMEABLE AGGREGATE LAYER NON-WOVEN GEOTEXTILE PREPARED SUBGRADE LIQUID BOOT ® PLUS 60 MILS DRY GAS VAPOR BARRIER VI-20 ™ GEOMEMBRANE BASE COURSE 4" MIN.
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