Prefabricated Drainage Composite
US 400DB-XL consists of a high flow dimpled drainage core formed from a moderate duty impermeable polymeric sheet cuspated under heat and pressure then bonded to a layer of non-woven filter fabric. The filter fabric retains soil and sand particles or freshly placed concrete or grout, allowing filtered water to pass into the drainage core. Collected water is then conveyed to the US SWD collection system.
US 400DB_XL performs a multi-faceted role by providing protection for waterproofing systems and managing sub-surface water around building foundations. US 420DB has an added membrane protective film on the back side.