[Construction Example 07] Renovation of the station's ceiling with retro limestone-style exterior materials.
With the concept of "returning to the origins of the station's construction era," the ceiling inside the station has been renovated with retro-style limestone-like exterior materials (fireproof specifications).
We would like to introduce an example of the ceiling in the underground station being renovated with a concept of "returning to the original design at the time of station construction," using a natural limestone-like material "Limestone (non-combustible specification)." 【Project】 [Renovation] Umeda Station North Mid-Level (Osaka City, Osaka Prefecture) ◇ Construction Date: February 2019 ◇ Construction Area: 1,294 m² ◇ Base Material: Aluminum Spandrel 【Customer's Challenges and Requests】 ◆ The ceiling in the subway station must be made of non-combustible materials. ◆ Due to the short working hours between the last train and the first train, a construction method that allows for a short construction period is desirable. ◆ The sterile ceiling of the busy station corridor should be designed to have a sense of luxury. 【Adoption Background】 ◇ The concept of this renovation work is to return to the design at the time of completion. ◇ Given that the work is on the ceiling of the subway station, we proposed aluminum spandrel combined with stone-like products (Limestone: non-combustible material specification). The adhesion strength to aluminum materials was confirmed through preliminary testing. 【Selection Points】 ◆ Since it is within the station, construction using non-combustible materials is possible, considering safety. ◆ The aluminum spandrel, which was pre-fabricated in the factory, was installed on-site to shorten the working time. ◆ By remodeling the ceiling into an arch shape, the sense of pressure in the corridor is alleviated, resulting in a design with a sense of luxury.
basic information
Natural Limestone Style "Limestone" The soft color tones and warm texture of natural limestone are faithfully reproduced using our unique technology. The pastel colors are preserved for a long time. *For more details, please refer to the PDF document or feel free to contact us.*
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Applications/Examples of results
[Standard Construction Process] [1] Substrate adjustment of the construction wall → [2] Marking out / Joint color application → [3] Joint tape application → [4] Base coat application of Hamacast material (spraying) → [5] Top coat application of Hamacast material / Pattern spraying → [6] Trowel finishing → [7] Paper texture adjustment → [8] Two coats of top coat application → [9] Completion
