Insulating the world’s longest sea bridge

Saving energy in three major port buildings

At 55 kilometres in length, the Hong Kong–Zhuhai–Macau Bridge is the world’s longest sea bridge, costing over 30 billion Hong Kong dollars. Opened in 2018, it now connects the Hong Kong and Macau special administrative regions with the mainland Chinese city of Zhuhai. 

The project required port travel buildings in Hong Kong, Zhuhai and Macao to accommodate entry and exit procedures for passengers, the inspection of vehicles and port offices. The scale was immense, with the building at Macao alone covering an area of 169,498m2. 

Thermal performance was a key requirement to ensure significant energy savings for the bridge project and to create a comfortable environment for tens of thousands of travellers using the facilities.

ThermalRock was chosen for all inspection buildings due to its excellent thermal properties and long-lasting performance. Since it is made of stone wool, it does not change shape or form, and will give predictable low energy costs for decades to come. Its resilience ensures that it will perform at its best for more than 60 years – even in China’s hot, humid environment where frequent storms, rainfall and temperature changes could affect other insulation materials.

ROCKWOOL Group also provided safe and reliable fire prevention solutions for partition walls, smoke exhaust ducts and fire-proof blocking. Stone wool withstands temperatures  above 1000°C which prevents fire from spreading, a crucial capability to safeguard passengers who use the bridge every day.

The Hong Kong–Zhuhai–Macau Bridge features some of the highest construction requirements and standards in the history of Chinese transportation. The ROCKWOOL Group’s thermal and fire-resilient materials passed strict engineering inspection and acceptance tests, which sets a precedent for the use of stone wool products in cross-sea bridges. Today, our solutions comprehensively guarantee the energy performance, comfort and safety of this first-class engineering project, for thousands of travellers.

Hong Kong–Zhuhai–Macau Bridge, China

Project location

Hong Kong–Zhuhai–Macau Bridge

Project Data

Year 2018
Building Type Bridge
Application Thermal Insulation
Product type ThermalRock-S. RockSafe