Build drainage board (injection build drainage board, drainage board, guide the water board, drainage board) has water, drainage function. Coupled with a layer of geotextile fabric surface to form a combination of water on board. In wet and dry conditions can be two-way adjustment. Insulation, every root waterproof, moisture permeability ...... is a good alternative to traditional water treatment materials. Application: drought, heat area green roofs, outdoor garage roof greening projects ...... Advantages: unique product structure and quality materials to make products with high compressive strength, light weight, water storage capacity, fast drainage, good ventilation, anti- aging, easy to plug, easy handling laying. Well-functioning drainage system for normal use and life cycle of civil construction and structures play an important role. Drainage Board porous tubes with an efficient drainage system, dredging cylindrical drainage plate and geotextiles to form a drainage system, to form a water seepage, water and drainage systems. Build drainage board purposes: Garden Project: garage roof greening, roof garden, soccer fields, golf courses, beach projects. Municipal engineering: road embankment, subway tunnels. Construction: building the basis of the upper or lower, basement and outside walls, roof and insulation and other impermeable. Traffic Engineering: roads, railway embankment, dams and slope protection layer.