AMERDRAIN Sheet Drain is used where large surface areas require drainage. Vertical applications include basement walls and retaining walls. Horizontal applications include plaza decks and roof gardens. The entire surface area can be covered to provide maximum drainage capacities. Sheet drains are typically made in 4'(1.2m) wide sheets in rolls 50-100'(16-33m) long. The core can be 1/4” to 1/2"(6-12mm) thick. Most sheet drains also serve as protection for waterproofing material, thereby eliminating the cost of a separate protection board.