Want to Build Passive Houses? Ask Us Anything

“I couldn’t unsee it.” Jimmy from June Building explains how Passive House building science finally clicked, after learning through Instagram and then winning the Pro Clima Passive House Tradesperson scholarship. Today Jimmy flips the format and turns up with a notebook full of questions on Passive House for us. Questions around high-performance homes, airtightness, mechanical ventilation, and what actually changes when you start building for comfort, not just compliance. Jimmy’s background is classic chippy-to-builder with a few turns that matter. Apprenticeship in Ballarat, travel to Banff in Canada, then Melbourne across maintenance, commercial, and high-end residential before moving to the Northern Rivers in early 2020. He’s now in the first 12 months of June Building, building the plane while flying it, and trying to bring Passive House principles into a market where clients aren’t necessarily asking for certification, even though mould, humidity, and comfort issues are everywhere. We talk about why you shouldn’t lead with the “Passive House” label and instead start with the problems people already feel in their current home: drafts, noise, dust, mould, and rooms that never feel right. Jimmy asks what details cause the most challenges, and we go straight to retrofits, because nothing is square, nothing is level, and you don’t find the real issues until you start pulling things apart. We also get blunt about where builders underquote when they move into high-performance construction, and it’s labour, all labour, especially detailing, wraps, window installs, battens, and set-out. Jimmy also pushes on PHPP and how builders should use it. PHPP isn’t just a certification hurdle. It’s a pre-construction tool for optimising cost and performance, spotting overheating risk early, and avoiding the nightmare of delivering a “high performance home” that still feels uncomfortable to live in. If you’re a builder, architect, or homeowner curious about Passive House Australia, high-performance building, and what it takes to lift your standard without blowing your budget, this episode is a solid place to start. CHAPTER MARKERS 00:00 Introduction 00:41 Pro Clima Scholarship Story 05:12 Discovering Passive House 06:04 Selling Performance in Byron 11:09 Mould Messaging Without Labels 14:10 Education-Based Marketing Debate 18:03 Building a Social Audience 23:57 Rapid Fire Passive House Qs 25:02 Retrofit Details and Underquoting 27:01 Estimating Labour and Costs 32:05 Estimating Passive House 34:27 Overheating and Shading 35:34 Reading PHPP as Builder 38:13 PHPP Course and Value 40:53 When to Use WUFI 42:44 Retrofit Wall Failures 44:14 Skills to Learn Early 45:14 AI Tools for Builders June Building: https://www.junebuilding.com.au/ Our Sponsors: Pro Clima - https://mindful-builder.captivate.fm/proclima Biz Tech Guru: https://www.biztechguru.com.au/ Wunderbuild: https://www.wunderbuild.com/ Connect with us on Instagram: @themindfulbuilderpod Connect with Hamish: Instagram: @sanctumhomes Website: <a href="http://www.yoursanctum.com.au/" rel="noopener noreferrer" target="_b