[Construction Example 09] The exterior walls of the Tokyo Metropolitan Government Building were constructed using weather-resistant, granite-like exterior materials.
The corridors of the Tokyo Metropolitan Government's new building and the exterior walls of each section of the building have been finished with "New Jewel," a three-color blown granite that has been color-matched to the original stone used in the building.
We introduce an example of approximately 8,000m2 of exterior walls, including the corridor of the newly constructed "Tokyo Metropolitan Government New Headquarters," which was finished with three color-matched blown granite-like "New Jewel." 【Property】 [New Construction] Tokyo Metropolitan Government Corridor, etc. (Shinjuku Ward, Tokyo) ◇Construction Date: December 1989 ◇Construction Area: Corridor, underground parking lot, etc., approximately 8,000m2 ◇Substrate: PCa, RC 【Customer's Challenges and Requests】 ◆We want the exterior walls of the corridor connecting the new headquarters to match the color and texture of the main stone on the headquarters side. ◆The corridor is approximately 50m long without support columns and vibrates, so we want to achieve structural lightweighting. ◆Underneath the corridor is a plaza, and below that is a road, making maintenance difficult, so a long-lasting coating material is desirable. 【Adoption Process】 ◇We proposed our products and construction methods to the architectural firm handling the new headquarters. ◇Our product's color-matching technology that resembles the main stone, along with its design, weather resistance, and technical documentation were evaluated, leading to its adoption. 【Selection Points】 ◆Color-matching technology and design that match the color and texture of the exterior wall material (natural stone) of the new headquarters. ◆Lighter than the main stone with strong adhesion, accommodating the behavior of the corridor's substrate. ◆Our product excels in weather resistance, durability, and stain resistance, maintaining a beautiful wall surface for an extended period.
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3-color blown granite-like (with mica) "New Jewel" Features a deeply carved design reminiscent of heavy stone architecture. It reproduces the unique texture of granite and creates an elegant wall surface. This product allows for three thickness options for the coating (4mm, 6mm, 8mm). *For more details, please refer to the PDF document or feel free to contact us.*
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[Standard Construction Process] [1] Substrate adjustment of the construction wall → [2] Marking/Joint color application → [3] Joint tape application → [4] Spraying of main material (Hamacast) → [5] Surface cutting (polishing) → [6] Application of top coat (two coats) → [7] Completion
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Since our founding in 1945, Hamacast has been creating "good things" that no one can imitate. We develop and manufacture unique exterior materials and waterproofing materials, such as high-design stone-like exterior materials that replicate natural stone and excel in weather resistance and stain resistance, as well as tile exterior wall renovation methods that are highly safe and durable. We also offer waterproofing methods that combine over 40 years of experience and achievements in complex waterproofing techniques with added insulation and durability. Furthermore, our strength lies in our "complete responsibility construction," which ensures consistent quality and performance by managing all stages of construction and aftercare. By maximizing this strength, we respond to our customers' needs by enhancing the asset value of buildings and reducing maintenance and renovation costs. Moving forward, we will continue to explore without compromise to shape the values of a new era, consistently creating "good things" for people, communities, and the environment.