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  Even in urban environments where there are many limitations on land use, technologies making it possible to plant on man-made foundations can be used to create biotopes. There are a number of merits, including the way these oases of greenery bring a bit of tranquility to people who see them, and that moisture from the plants helps lower building temperatures.  While greenery areas can only be of limited size in the city, rooftops can be effectively used for greenery. Tsuchiya-gumi implements rooftop greenery from basic plans developed by overseas designers, and has successfully completed a wide range of projects through its technology and expertise.
 We are engaged in a range of research projects to develop our own methods for rooftop greenery. It is a comprehensive research effort, including not only research into the materials needed but also how to utilize them most effectively.  1. Weight issues Maximum loads have been established for rooftops, and lightweight materials (especially soil) are best. A number of suitable products are already available on the market, providing a range of price and weight variations. 2. Wind-related issues The rooftop is usually directly exposed to the wind, which can topple plants or blow away soil. Various materials to secure plants have been developed, and granular soils can be used to minimize wind effects. 3. Watering methods Because subsurface water is unavailable, rooftops plantings may dry out easily. Various measures include selecting plants that can withstand low-moisture environments, installing watering systems and use soil with high moisture retention performance. Even plants capable of thriving under low-water conditions, however, generally require water to maintain their beautiful appearance.  - Research and development into methods of minimizing water supply - Research into maintenance and management methods with minimal labor requirements - Research into facility life and insulation performance  1. Drip-watering system experiment Drip-watering facility: Plants are grouped around a central location for watering. The water is supplied a little at a time, minimizing consumption. 2. Mulching experiment (evaporation reduction and weed prevention) Mulch* of a size large enough to prevent capillary action is used to minimize moisture loss from the soil surface through evaporation, while also preventing invading plants from growing. One good candidate for this type of mulch is pulverized plastic, which is light in weight and does not absorb water. * Mulch: A material used to cover the roots of plants to prevent evaporation from the soil surface. 3. Groundwater utilization system for low-rise buildings and building walls Groundwater utilization: Cotton ropes are used to draw up moisture contained in the ground.  Tsuchiya-gumi Kasugai Sales Office
 Vines are frequently used in wall greenery. One of the reasons is that vines do not possess a thick trunk, making it easy to use them even in relatively narrow spaces. 
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