| 摘要 |
PROBLEM TO BE SOLVED: To provide a rooftop greening system at low cost and slight maintenance, having such advantages as to enable greening with lightweight and thin soil even in the case of a building with a structure less than 180 kg/m<2> in withstand load, to sustainably supply water by reserving and sprinkling rainwater by making use thereof, to raise its sprinkling efficiency by the use of porous ceramics as the water-holding base, and to enable the greening plant to vividly grow without sun-withering despite using the lightweight and thin soil. SOLUTION: This rooftop greening system ahs the following advantages: water deprived of by the rise in the rooftop surface temperature due to direct sunlight is compensated by the aid of a water-holding porous ceramic base material through a small amount of sprinkled water and few sprinkling spots to raise water sprinkling efficiency, the base material set on the rooftop surface holds water without causing sun-withering of the greening plant with the lightweight and thin soil and supplies a moderate amount of water to the soil, and the soil and the roots of the greening plant are set/taken in the porous ceramic base material so as not to debond both the soil and the greening plant roots off the base material by wind pressure. Besides, this rooftop greening system is light in weight with only the soil at partial spots because of being made up of a liane.
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