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Tsurumi Public Works Office (refurbished)
Tsurumi Public Works Office Renovation Project (acquisition of ZEB Ready)
Last updated on April 7, 2025.
Overview of Construction
| Name of the facility | Tsurumi Public Works Office |
|---|---|
Location |
3-28-1, Tsurumichuo, Tsurumi-ku |
| Building area | 553.31㎡ |
| Total floor area | 1,465.71㎡ |
| Completed construction | 1998 |
| Building structure | RC, 2 stories above ground |
| Facility use | Office |
| Job type | Contents |
|---|---|
| Architecture | High insulation of window sashes by replacing single-plate glass with Low-E multi-layer glass with Attachment. |
Protection of existing asphalt waterproofing The roof is highly insulated by applying ground treatment to concrete and waterproofing external insulation sheet. |
|
| Electricity | Use LED lighting in all rooms |
| Machinery | By reviewing the air-conditioning load capacity, we changed from the central heat source method to the individual heat source method, and adopted a high-efficiency packaged air conditioner. |
※The construction is mainly based on the renewal of existing parts and equipment for the extension of life, and does not include energy creation (photovoltaic power generation, etc.).
Certification
We obtained ZEB Ready certification on April 23, 2024.
BEI value: 0.48 (52% reduction in energy compared to conventional buildings)
BELS display mark (PDF: 1,347KB)
Start of construction
| Architecture | Electricity | Machinery | |
|---|---|---|---|
| Name of construction | Tsurumi Public Works Office rooftop waterproofing repair and other construction work | Renewal of lighting equipment in Tsurumi Public Works Office | Renovation of air conditioning equipment in Tsurumi Public Works Office |
| Contractor | Keio Kensetsu Yokohama Co., Ltd. | Toho Electric Construction Co., Ltd. | Marushin Kogyosho Co., Ltd. |
| Construction period | From Wednesday, August 21, 2024 to Friday, February 28, 2025 | ||
※Construction orders from each contractor are placed by the Yokohama City Building conservation Corporation.
State of construction
Tsurumi Public Works Office (under construction)
Introduction of rooftop waterproofing renovation work (building)
Protection of existing asphalt waterproof protection This is the work of applying ground treatment to concrete and waterproofing external insulation sheet. The area where the living room is located downstairs is insulated to suppress the heat load from the outside. The cross section of the external insulation sheet waterproofing is as shown in the photo of the external insulation sheet waterproofing (section), and is mainly divided into layers of insulation, reinforcement boards, and waterproof sheets. In areas where there is no living room downstairs, heat insulation is not performed, and only waterproof sheets are used.
Photo of external insulation sheet waterproofing (cross-section)
Photo of waterproofing of external insulation sheet
Reinforcing boards are installed with open joints as shown in the fixed photo of the reinforcement boards and insulation materials to prevent them from sticking up. In addition, fixing the insulation and reinforcement plate with the fixed metal fittings used in the photo, and covering the waterproof sheet from above, it looks like a photo of external insulation sheet waterproofing.
Photos of fixing reinforcement boards and insulation materials
Photo of fixed metal fittings used
Introduction of construction details
1 Rooftop waterproofing repair (building)
Please refer to "Construction of Construction" for details.
Before rooftop waterproofing repair
After roof waterproofing repair
2 Window insulation renovation (building)
By replacing single-plate glass used in windows with low-E double-glazing glass with Attachment, the window sash has been highly insulated.
Before renovation of window insulation
After renovation of window insulation
Low-E multi-layer glass with Attachment
3 Use of LED lighting (electricity)
By using high-efficiency equipment, all rooms and lighting have been converted to LEDs to reduce heat inside the room.
Before renovation of lighting (wind removal room)
Refurbishment of lighting (wind removal room)
After renovation of lighting (wind removal room)
Before renovation of lighting (office room)
After renovation of lighting (office room)
4 Removal of central heat source equipment (machine)
Absorptive cold water generator, cooling tower, cold water pump, cooling water pump, expansion tank, pressurized water supply pump unit for air conditioning (with water receiving tank) were installed by the central heat source method, but in this renovation, it was removed because it was changed to an individual air conditioning system.
Before removal of each equipment (machine room)
After removing each equipment (mechanical room)
Before removing equipment (rooftop)
After removing equipment (rooftop)
5 Installation of package type air conditioners
Since the central heat source equipment was removed, package-type air conditioners were installed in each room. Outdoor units are installed around the building on the first floor, on the second floor balcony and on the rooftop.
Indoor units
Before renovation of the indoor unit (meeting room)
After renovation of the indoor unit (meeting room)
Outdoor units
Before installation of outdoor unit (around the building on the first floor)
After installation of the outdoor unit (around the building on the first floor)
Before installation of outdoor unit (balcony on the 2nd floor)
After installation of outdoor unit (balcony on the 2nd floor)
Schedule
- Review of ZEB renovation design for FY2022
- 2023 Design Operations
- Acquired ZEB Ready certification for FY2024 and started construction
Press release materials
Press release document (PDF: 368KB)
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Inquiries to this page
Housing and Architecture Bureau Public Architecture Department conservation Promotion Division
Phone: 045-671-2982
Phone: 045-671-2982
Fax: 045-664-5244
E-Mail address [email protected]
Page ID: 279-923-913
