Water is killing our homes and buildings

Mindful Builder

In this episode, we delve into the world of building science with Dr. Cameron Munro, an aerospace engineer turned building physics expert. We explore his journey from mechanical engineering to building science, discuss the challenges of trying to build his first Passive House, and learn about the evolving landscape of sustainable building practices in Australia. Cameron also shares insights on the health implications of using fireplaces in high-performance homes and provides practical advice for builders and homeowners interested in energy-efficient construction.

Building Science

Building science is the study of how different disciplines (engineering, architecture, physics) work together to create a healthy and functional building. It focuses on factors like thermal comfort, air quality, acoustics, and light, ensuring the building meets the needs of its occupants. One of the biggest threats a building scientist has to prepare against is moisture. If not managed properly, moisture can lead to serious problems like mold growth, rot, and even structural issues.

Moisture Management

Cameron explains how historical building practices allowed heat generated inside to escape through uninsulated walls, drying out any moisture in the process. However, with the modern introduction of insulation for energy efficiency, this natural drying process has been hampered, and we need to use building science to adapt. The principles of building science help us design systems that prevent water intrusion and control air movement and vapor diffusion to prevent condensation before it becomes a problem.

Keeping it Airtight

One key factor in moisture management is how airtight a building is. This refers to how well a building envelope prevents uncontrolled air leakage. Leaky buildings waste energy and can worsen moisture problems. Simple building assemblies with proper air barriers are often the most effective solution, while more complex designs require careful planning and construction to achieve good airtightness.

At the end of the conversation, Cameron shares his experience attempting to build a certified Passive House and the challenges he faced. Despite falling slightly short of certification, his meticulous approach and the lessons learned serve as invaluable guidance for anyone embarking on similar projects.

LINKS:

Sanctum Homes: www.yoursanctum.com.au/

Carland Constructions: www.carlandconstructions.com/