Sustainable Builders Yak
For Australian construction professionals building high-performing, sustainable homes and homeowners looking to create their own sustainable, high-performing home.
Sustainable Builders Yak
Ep #63 Bridging the Gap: Overcoming Australia's Home Performance Crisis with Ben Walsham
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In this episode, Ben Walsham from Arkata shares his journey from studying as an architect to becoming a certified energy assessor, and how witnessing underperforming, single-glazed luxury developments drove him to step away from traditional volume building to tackle Australia's home performance crisis. The conversation explores how a simple shift in mindset, moving away from added R-values and looking at total U-values instead, can completely reframe how architects and homeowners understand heat loss and window budgets.
The conversation digs deep into the realities of modern construction, bridging the gap between design theory and actual on-site sequencing. Ben explains how Arkata utilises early-stage thermal modelling and a unique "value engineering for performance" dashboard to eliminate weeks of frustrating coordination, helping clients optimise their designs before town planning approval. We also dive into the future of the industry, unpacking the upcoming 2029 code changes, the rise of AI-powered compliance tools like NatHERS Hero, and why mandatory energy disclosure at the point of sale is the ultimate financial catalyst needed to transform Australia’s housing market.
EPISODE HIGHLIGHTS
- Ben’s origin story: from volume builder graduate architect to sustainability consultant
- The reality gap: how architecture curriculum falls short on contract admin and buildability
- Reframing metrics: why added R-values mislead the industry and how U-values expose glass as the weakest link
- Value engineering for performance: using upfront dashboards to balance budgets and hit 8+ star ratings
- The 2029 code roadmap: AI-powered software, NatHERS Hero, and scaling efficiency to 200,000 homes a year
- As-built verification: the transition toward airtightness testing and closing the performance gap
- Mandatory energy disclosure: how banks, ESG ratings, and point-of-sale reporting will drive the retrofit economy
- Quick-fire round: passive house vs. solar design, SIPS alternative construction, and a surprising love for death metal
LEARN MORE
- Arkata: https://arkata.com/
- Sustainable Builders Alliance (SBA): https://www.thesba.com.au
BROUGHT TO YOU BY
- The Sustainable Builders Yak Podcast