Turning a volume built house into a passive house

Mindful Builder

Think your old home can’t achieve today’s high-performance standards? Think again.

We're here to challenge conventions by retrofitting a typical Burbank home from the '90s into a certified Passive House. No extra frills, no new builds—just clever planning and innovative techniques.

Join us as we take you on a journey that proves you don’t need to start from scratch to achieve groundbreaking energy efficiency!

It's been a while since it was just the two of us on the podcast. We’ve had some pretty amazing guests lately, but today we’re diving back into our duo dynamic. And what better way to do that than by sharing our projects with you?

It’s easy to show off the polished, Instagram-ready end product but often things behind the scenes are far from perfect. We believe in transparency, which is why we’re starting a four-part series focusing on Matt’s work retrofitting an old volume-built house into a certified passive house.

If you’ve been listening for a while you probably know what a Passive House is, but in case you don’t, they’re buildings designed to require minimal energy for their heating and cooling. Typically, this means excellent insulation, air-tight construction, and windows that prevent heat loss.

Retrofitting a building to meet Passive House standards comes with unique challenges that you don’t face building from scratch. The building is already there so you can’t change the orientation of the house or the positions of windows easily. Despite the extra challenges, projects like this are incredibly achievable. We know that a lot our listeners probably own older homes, and we hope this series can inspire you to make them more energy-efficient and comfortable.

From the very beginning, this project was fraught with unknowns. We needed to replace the house’s existing, ageing systems, including the electrical wiring and plumbing. Finding where all the mains were connected became a hunt of its own.

We had to make significant decisions about how to insulate the house from the inside without touching the brick cladding. We knew the original windows wouldn’t cut it for a Passive House, so we decided to replace them with high-performance triple-glazed windows.

Through it all, our guiding principle was clear: water kills buildings. We needed to ensure the house was water and air-tight, even more so than focusing solely on Passive House standards. Collaborating with our project partners and trades was incredibly helpful here. For instance, Cameron from Hit V Hype helped us model the project thoroughly, to ensure we didn't overlook anything.

Even though the project isn’t fully completed, early indications of its success are evident. The house, once unoccupied and deteriorating, now boasts consistent indoor temperatures and markedly improved air quality. Tradespeople working on-site have noted the enhanced comfort levels, even before the final touches are in place.

The projected energy savings are also significant. We’ve managed to reduce the expected annual heating costs from about $8,802 to roughly $1,600 – a testament to the enormous efficiency gains achieved through this retrofit.

Stay tuned for the next parts, where we dive into the nitty-gritty of the construction phase!

Cheers,

Matt & Hamish

LINKS:

Connect with us on Instagram: @themindfulbuilderpod

Connect with Hamish:

Instagram: @sanctumhomes

Website: www.yoursanctum.com.au/

Connect with Matt:

Instagram: @carlandconstructions

Website: www.carlandconstructions.com/