September 11, 2009
Kuraray Co., Ltd.
(The Kuraray Group)
Kuraray Trading Co., Ltd. (Headquarters: Osaka City, President: Osamu Asaba) announces the release of a lightweight, thin-layer rooftop gardening and corrugated plate roof-greening system on September 16, 2009. This system was developed jointly and will be sold by the eight member companies of the Thin-Layer Rooftop Gardening Research Group. It features reduced load on buildings and superior low-maintenance capabilities.
Limitations on the amount of soil used in order to reduce the load on buildings have been an issue for conventional rooftop gardening systems. This limitation has resulted in increased soil temperatures and, in turn, a greater tendency towards drying. Consequently, regular watering and cleaning was required. This problem has been solved by the thin-layer rooftop gardening and corrugated plate roof-greening system’s potting soil component, thanks to its use of a soil pouch that was recently developed by Kuraray Trading. Featuring a silver-colored surface and lightweight gardening materials with upgraded heat insulation that effectively reflects sunlight, soil pouches can be filled with appropriate amounts of soil and placed on rooftops.
The lightweight, thin-layer rooftop gardening and corrugated plate roof-greening system uses high-heat insulation panels with root-damage-resistant sheets (manufactured by Sekisui Plastics Co., Ltd.) and is constructed with a flat surface that is placed over corrugated plate roofs. The mat, filter and soil pouch construction is placed above this to allow for plant growth.
Examples of Thin-Layer Rooftop Gardening and Corrugated Plate Roof-Greening System Constructions
The eight companies that jointly developed the thin-layer rooftop gardening and corrugated plate roof-greening system established the Thin-Layer Rooftop Gardening Research Group in 2005 and conducted R&D related to rooftop gardening systems that reduce the load on buildings. Rooftop gardening alleviates the urban “heat-island” phenomenon by offering such benefits as preventing the reflection of sunlight, lessening rainwater drainage, achieving heat insulation that effectively reduces air conditioning costs and providing an area suitable for rest and relaxation. Rooftop gardening is developing into an environmental business field that is expected to be beneficial from a variety of standpoints, including energy conservation, aesthetics and legal considerations.
|Headquarters||1-12-39 Umeda, Kita-ku, Osaka City (Shin Hankyu Building)|
|Number of employees||321 (as of March 31, 2009)|
|Business activities||A specialized manufacturing trading company of the Kuraray Group that provides a full range of services related to the manufacture and sale of raw materials, textile materials and products. It responds to a diverse array of market needs through comprehensive services that engage in product-related information and the planning and development of distribution and sales systems.|