What may initially appear as a simple ceiling stain, damp wall or minor water leak could be a sign of a much bigger problem affecting buildings across Malaysia. From residential properties and hotels to commercial developments and public infrastructure, recurring waterproofing failures are creating costly maintenance challenges and raising concerns over the long-term performance and value of buildings.

Industry estimates suggest that as many as 80% of building defects in Malaysia may be associated with waterproofing failures, while surveys have found that nearly nine in 10 Malaysian homeowners have experienced water leakage problems in their properties. These figures highlight the importance of treating waterproofing as a critical component of building construction and maintenance rather than a problem to be addressed only after leaks appear.

According to Tay Sze Tuck, General Manager of Nippon Paint Malaysia, waterproofing failures are rarely caused by a single issue. Instead, they often stem from incomplete systems, incorrect application methods, inadequate understanding of environmental conditions or decisions driven by short-term cost savings rather than long-term performance.

The issue was highlighted during a recent waterproofing workshop organised by Nippon Paint Malaysia, which brought together developers, property managers and other industry stakeholders to strengthen knowledge and improve waterproofing practices. Participants were reminded that compromises made during construction may remain hidden behind building finishes, only to emerge months or even years after a project has been completed and handed over.

For property owners and management teams, delayed waterproofing failures can create a significant financial burden. Once a building enters its operational phase, recurring leaks may require repeated repairs, with costs eventually falling on property owners, joint management bodies, asset managers and maintenance teams. In many cases, the initial savings achieved through cheaper materials or reduced application processes can be outweighed by long-term repair and maintenance expenses.

Haji Ishak Ismail, President of The Malaysian Institute of Property and Facility Managers (MIPFM), noted that property managers often inherit waterproofing challenges stemming from decisions made long before they take over a building. He stressed that better technical understanding, stronger collaboration between stakeholders and a commitment to getting waterproofing right from the beginning are essential to protecting the value and performance of buildings.

Flat roofs were also highlighted as one of the most challenging areas for waterproofing due to constant exposure to harsh weather, ultraviolet radiation and standing water. Aaron Ang, Senior Manager of the Waterproofing Division at Nippon Paint Malaysia, said technical demonstrations using systems such as NippoGARD M4000-TA and NippoSEAL Flex 200 Fibre Pro helped participants understand the importance of selecting waterproofing solutions suited to specific applications.

The workshop also emphasised that waterproofing should never be approached as a one-size-fits-all solution. Different building areas face different environmental and structural conditions, while the actual source of a leak may not always be located where water stains appear. Since water can travel through building structures, proper inspection and diagnosis are critical to preventing repeated repairs in the wrong locations.


Knowledge gaps among building owners, property managers and management committees can further contribute to recurring waterproofing problems, particularly when decisions are based primarily on upfront costs or familiarity with certain products. While Malaysian regulations and industry specifications provide basic requirements for waterproofing, the quality of implementation can vary between projects, with cost pressures sometimes influencing material selection and application practices.

The consequences of repeated water leakage extend beyond maintenance expenses. Persistent moisture intrusion can disrupt business operations, affect tenant and customer confidence, accelerate deterioration of building assets, corrode steel reinforcement and weaken concrete structures. Damp environments can also contribute to mould growth and create unhealthy indoor conditions, making waterproofing a concern that extends to building safety, occupant wellbeing and business continuity.

The hospitality sector is particularly vulnerable to the impact of waterproofing failures, where recurring leaks can lead to room closures, guest complaints, operational disruptions and reputational damage. While selecting the cheapest repair option may offer immediate savings, repeated failures can ultimately result in significantly higher lifecycle costs and affect the overall guest experience.

Industry stakeholders are therefore calling for a shift away from a "fix later" mentality towards preventive maintenance, proper technical assessment and long-term planning. Waterproofing systems should be evaluated based on their expected service life, compatibility with existing structures and long-term performance, rather than initial cost alone.

As Malaysia's building landscape continues to expand, the importance of getting waterproofing right from the outset is becoming increasingly clear. By investing in appropriate systems, proper surface preparation, skilled application and regular maintenance, developers and building owners can reduce the risk of recurring failures while protecting the safety, performance and long-term value of their properties.