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  6. Rooftop greening system: Evergreen Kiri grass bag method. What are the causes of failure in rooftop greening?

Rooftop greening system: Evergreen Kiri grass bag method. What are the causes of failure in rooftop greening?

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last updated:Jun 20, 2026

緑化計画研究所
緑化計画研究所
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There are solutions to the causes of plant selection errors, overgrown weeds, soil erosion, and failures in rooftop greening systems.

"The Rooftop Greening Revolution Begins" Recently, phenomena such as heavy rain and strong winds, which were previously called abnormal weather, are starting to become normal. The plants used in the thin-layer rooftop greening so far have mainly been sedums, but they are declining due to the recent weather conditions. Additionally, soil is being washed away by heavy rain and strong winds, leading to overgrowth of weeds. "Causes of Rooftop Greening Failures" Please see the detailed information below. Previous rooftop greening systems were complex and could only be managed by specialized contractors. The rooftop greening revolution aims to break away from these existing methods and maintain a green oasis easily and sustainably. The system that has made this rooftop greening revolution possible is the "Evergreen Kiri-so Bag Method®," which ensures successful rooftop greening. "Features of the Evergreen Kiri-so Bag Method" ■ Soil erosion prevention ■ Weed control ■ Easy greening ■ Low maintenance ■ No irrigation needed The Evergreen Kiri-so Bag Method is a new greening approach that puts specialized soil for evergreen Kiri-so into bags, achieving "soil erosion prevention," "weed control," and "easy greening." Search for "Rooftop Greening Revolution" on YouTube to find videos of soil erosion experiments. You can navigate to the video page through the related links below.

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Rooftop greening system: Evergreen Kiri grass bag method. What are the causes of failure in rooftop greening?

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This is a rooftop greening product that overcomes the causes of past failures and issues in rooftop greening. It utilizes a zipper-type planting bag method with evergreen sedum (FTM bag). This bag method (Patent No. 4911418 + Registered Trademark No. 6125712) is a triple intellectual property product with a variety registration (Variety Registration No. 15866). The triple intellectual property of the evergreen sedum bag method (patent, trademark, variety registration) leads to successful rooftop greening. 1. Prevents the intrusion of weeds 2. Prevents soil runoff 3. Easy installation with a zipper The standard size of the bag method is 50 cm square, with a wet weight of 13 kg per bag. There is also a rectangular type measuring 15 cm × 100 cm available. Grommet options and custom sizes are possible. The rectangular type is used for wall greening and folded roof greening. The bag material is made of root barrier sheet, which stops the intrusion of weeds and prevents soil scattering and runoff. The bag allows the evergreen sedum to provide moisture to the soil while preventing soil drying. The site receives bags filled with soil and seedlings of evergreen sedum, so you simply open the zipper of the bag, insert the seedlings, and close the zipper. It is a simple greening system that completes the greening by just arranging the bags with plants.

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Applications/Examples of results

【Evergreen Giraffe Grass Bag Method Achievements】 〇 Over 500 private facilities 〇 Over 50 public facilities Numerous others 【Greening Applications】 〇 Rooftop greening, folded plate roof greening, wall greening, slope greening, erosion control dam greening, road greening, concrete slope greening, environmental greening, weed control under solar panels, etc. 【Applications】 〇 Government and public agency facilities, public buildings 〇 Factories, offices, commercial facilities 〇 Apartments, residential buildings 〇 Civil engineering structures, erosion control dams, slopes 〇 Ground cover 〇 Weed control

Detailed information

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Rooftop Greening Revolution - Soil Erosion and Dispersion Experiment - Evergreen Kiri Grass Bag Method

Rooftop Greening Revolution - Soil Erosion and Dispersion Experiment - Evergreen Kiri Grass Bag Method

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Rooftop Greening Revolution B - A Fail-Proof Rooftop Greening System - Evergreen Kiri Grass Bag Method

Rooftop Greening Revolution B - A Fail-Proof Rooftop Greening System - Evergreen Kiri Grass Bag Method

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Rooftop Greening Revolution A - A Fail-Proof Rooftop Greening System - Evergreen Kiri Grass Bag Method

Rooftop Greening Revolution A - A Fail-Proof Rooftop Greening System - Evergreen Kiri Grass Bag Method

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Fail-proof Rooftop Greening System 'Evergreen Kiri Grass Bag Method' (Summary Version)

Fail-proof Rooftop Greening System 'Evergreen Kiri Grass Bag Method' (Summary Version)

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CAD data(3)

Model number overview File
Standard cross-section PDF of evergreen giraffe grass bag method.
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Evergreen Giraffe Grass Bag Method Standard Section Drawing DWG
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Evergreen Giraffe Grass Bag Method Standard Section Drawing DXF
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緑化計画研究所

緑化計画研究所

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In manufacturing, there are people, and in projects, there is drama. The "passion" of three individuals transcends the boundaries of the company to create "co-creation" and "hope." In April 2007, at an exhibition, a certain project team was born. They wanted to create new solutions originating from the field to solve customer problems. Three professionals who shared such a passionate desire met, leading to the establishment of the Evergreen Kiri-Sou Promotion Association. Professionals in plants, architecture, civil engineering, and equipment breathe new life into the city. A series of moving moments. The opportunities to experience moments where the heartbeat never stops are becoming fewer. Why is that? Perhaps it is because the number of fakes and forgeries has increased. We aim to continue being professionals involved in plants, architecture, civil engineering, and equipment, and we operate the Evergreen Kiri-Sou Promotion Association. The professionals have developed new greening methods and greening systems. That is the Evergreen Kiri-Sou bag method.

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