Proposed Building Code Reforms Aim to Mitigate Water Leak Issues

Water leaks account for up to 90% of building defects, imposing an estimated annual cost of $3 billion on building owners and insurance companies. The proposed changes to the NCC focus on improving waterproofing and water shedding standards to minimise the risk of water ingress and accumulation within buildings. Additionally, the reforms aim to prevent redirected water from causing damage to adjacent properties.

Key aspects of the proposed amendments include:

• Utilising gravity to naturally collect, redirect, and drain water, thereby reducing the likelihood of water pooling and subsequent leaks.
• Eliminating flat surfaces from balconies, roofs, and basement floors, which are common areas prone to water accumulation and leakage.
• Implementing new guidelines for outdoor concrete slabs, requiring structural engineers to account for potential sagging over a 10-year period to ensure continued effective drainage.

Romilly Madew, CEO of Engineers Australia, emphasised the collective responsibility of industry stakeholders—including builders, architects, developers, and designers—in improving standards to meet Australia's unprecedented housing demand. She highlighted the importance of addressing existing challenges to facilitate the delivery of high-quality, resilient housing.

Michael van Koeverden, a member of Engineers Australia, pointed out the urgency of these changes, noting that while slab membranes typically have a lifespan of 10-15 years, structural designs are intended to last 40-60 years. The proposed NCC amendments aim to bridge this gap by enhancing design and construction processes and fostering collaboration among all parties involved in building projects.

For construction professionals, these proposed changes signify a shift towards more stringent standards that prioritise long-term building integrity and occupant safety. Adapting to these reforms will require a thorough understanding of the new guidelines and a commitment to implementing best practices in waterproofing and drainage design.

From an insurance perspective, the adoption of these enhanced standards could lead to a reduction in claims related to water damage, thereby potentially lowering premiums and improving the overall risk profile of insured properties. Insurers may also consider offering incentives for buildings that comply with the updated NCC standards, recognising the proactive measures taken to mitigate water-related risks.

In conclusion, the support from Engineers Australia for the proposed NCC amendments highlights a proactive approach to addressing a longstanding issue within the construction industry. By embracing these changes, stakeholders can contribute to the development of more resilient buildings, ultimately benefiting owners, occupants, and the broader community.