The Petronas Towers, since their completion in 1998, have been subject to ongoing maintenance and occasional repairs to ensure their status as one of the premier architectural landmarks in the world is maintained. While specific details about every repair and maintenance activity may not be publicly available, several key aspects of maintaining such a monumental structure can be highlighted:

Structural Integrity

• The towers were designed to withstand the harsh tropical climate of Malaysia, including heavy rain and potential seismic activity. Regular structural assessments are conducted to ensure the integrity of the towers remains uncompromised.

Facade Maintenance

• The exterior of the Petronas Towers is made of steel and glass, requiring regular cleaning to maintain its aesthetic appearance. Given the towers' height and the tropical climate, this is no small feat and involves specialized equipment and skilled personnel.

Window Cleaning

• Cleaning the towers' windows is a particularly challenging task due to their sheer number and the building's height. This task is performed by a team of professional window cleaners using gondola systems, ensuring that the glass facade remains spotless and clear.

Elevator Maintenance

• The Petronas Towers are equipped with high-speed elevators to transport tenants and visitors throughout the building. These elevators undergo regular maintenance checks to ensure safety and efficiency.

Air Conditioning System

• The air conditioning system in the towers is crucial for maintaining a comfortable environment inside the buildings. Given Malaysia's hot and humid climate, the system is regularly checked and maintained to operate efficiently.

Safety Systems

• Fire safety systems, including sprinklers, alarms, and emergency lighting, are periodically tested and updated to adhere to the latest safety standards and technology.

Upgrades

• Over the years, the Petronas Towers have seen various upgrades to their internal systems and infrastructure, including security systems, lighting, and energy management systems, to improve efficiency and sustainability.

Skybridge Maintenance

• The skybridge connecting the two towers is a unique feature that requires special attention to ensure its structural integrity and safety for visitors.

The maintenance and repair activities at the Petronas Towers are managed by a dedicated facility management team that oversees all aspects of the buildings' upkeep. These efforts ensure the towers not only remain functional as office and retail spaces but also continue to be a symbol of pride and achievement for Malaysia.