Sustainable Holmes

Whether you're planning a renovation or building new home in Greater Sydney, the Southern Highlands, or the Illawarra-Shoalhaven areas, this podcast is your guide to clarifying your sustainable home goals, to connecting with the right professionals, understanding what makes homes perform better, and using materials wisely.

Sustainable Holmes is a education podcast hosted by Robyn Johnson, with 10 episodes on record and a Required Pod Score of 80. PitchCentric scores this show on Booking Probability, Listen Score, and live audience signals refreshed every 24 hours.

Robyn Johnson hosts Sustainable Holmes, a education show with 10 episodes published.

Our AI reads these to draft pitches. Use them as grounding for a pitch that cites a real guest and a specific topic.

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  Sustainable Holmes

  The Mechanical Ventilation Conversation You Need to Hear

  Jun 8, 202646 minS0

  Continuing the conversation with Cameron Grant from Fresh Ventilation, before welcoming co-director Claire Grant — the founder of the business.Heat recovery ventilation (HRV) is booming, but many homeowners are paying more for an ERV assuming it's better. A Fantech study in Sydney found an HRV outperformed an ERV for 50 out of 52 weeks of the year — for most of Greater Sydney and south of Newcastle, HRV is the right choice.The DVS Reclaim offers a more affordable retrofit heat recovery option designed to work outside the thermal envelope — and Cameron saw window condensation disappear overnight in one particularly problematic home.Unflued gas he...

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  Sustainable Holmes

  Is your subfloor getting any air?

  May 18, 202650 minS0

  <p>In this episode Robyn sets out to answer the question of what is really happening in built homes with subfloors, are we getting it right? Do passive vents works? How do we successfully balance indoor air quality, energy efficiency, bushfire risk and design aesthetics?</p>Fresh Ventilation's team has been crawling through subfloors for 16 years and has rarely seen one that's clean and dry.The NCC sets minimum requirements for subfloor vents, but passive vents struggle in many common situations — bushfire-rated areas with restricted mesh openings, narrow blocks hemmed in by fencing, low-lying positions in the landscape, and homes wh...

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  Sustainable Holmes

  Passive House or High Performance? Start With Your Builder

  Mar 23, 20261h 14mS0

  <p>Nathan is refreshingly honest about the early years of Newfound Building — the jobs he underquoted, the stress, and eventually the turning point when he committed to business coaching through Live Life Build. Simple changes followed: a structured inquiry form, clear business hours on the letterhead, and expectations set with clients from day one. Not complicated — but game-changing. From there, a second round of coaching through Future Builder pushed the business further, this time into job management systems and live cost tracking through their software, Wunderbuild. Nathan talks candidly about what that visibility over project costs has meant for how they...

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  Sustainable Holmes

  What's Trapped in Your Walls: The Building Wrap Revolution with John Martin of Volcano Construction Products

  Mar 2, 202650 minS0

  <p>Most Australian homeowners have never heard of a building wrap — and that gap in knowledge, says today's guest, is quietly costing them money, comfort, and their health.</p><p>John Martin is a chemical material scientist who spent years working internationally, designing high-performance building membranes that are standard practice across European construction. When he returned to Australia and bought a property, he pulled apart his walls and found what he describes as an industry-wide problem: homes built without the products needed to manage air leakage, moisture and transport of water vapour inside wall cavities.</p><p>In this episode, Jo...

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  Sustainable Holmes

  Designing Homes That Belong with Alex Urena

  Feb 9, 20261h 21mS0

  <p>What if your "difficult" south-facing block could become your home's greatest asset? Or your tight renovation budget could create a space that feels twice its size? In this conversation, award-winning building designer Alex Urena reveals how ancient Peruvian architectural wisdom meets modern Australian sustainability to create homes that truly belong.</p><p>Alex shares his unique design philosophy—one that begins with a ritual of touching the earth, asking permission, and listening to what the land wants to say. This deep respect for place, combined with 25 years of design experience across two continents, has resulted in homes that feel as...

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