DELTA®-DRAIN Vertical Drainage Barrier is comprised of a 2-layer geocomposite. The first layer is the polypropylene drainage core that drains incoming water freely to the footing perimeter drain, thus preventing the build-up of hydrostatic pressure against the waterproofing layer. It also acts as a highly effective protection layer for the waterproofing material during backfill operations. The second layer is a heat-bonded PP geotextile. The rot-proof geotextile is highly water permeable and prevents clogging of the flow passages in the drainage core.
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