| 摘要 |
A product, and a wall system utilizing such product, adapted to allow drainage of moisture from a wall of a structure. A sheet of corrugated material forms a plurality of ridges and grooves on opposite sides of the sheet of corrugated material. The sheet of corrugated material is relatively inflexible under a force applied generally perpendicular to the sheet. The sheet of corrugated material has a multiplicity of perforations. A sheet of water permeable material is affixed to one side of the sheet of corrugated material. The product is flexible in a direction along the plurality of ridges and grooves allowing the product to be stocked in roll form. A method of providing drainage of moisture from a wall structure is also disclosed.
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