Grand Designs Passive House Premium

We recently had the honour of being featured on the renowned Grand Designs, contributing to what was set to become the UK’s first Passive House Premium in the North Cotswolds! Grand Designs embarked on a mission to showcase innovation in sustainable housing and this project showcases the future of sustainable living. Passivhaus airtightness testing played a crucial role in Duncan & Liz’s build and our team was called upon to lend our expertise. The challenge perfectly aligns with our commitment to pushing the boundaries of energy efficiency in construction.

The Passivhaus Promise: What is a Passive House Premium?

Passivhaus is a rigorous energy efficiency standard. The German-born standard emphasises airtightness and insulation to minimise energy consumption and maximise comfort. Homes built to this standard achieve exceptional levels of comfort and minimal energy use.

Passivhaus offers various levels of certification, with Passivhaus Classic being the foundation. Here’s a breakdown:

Why is Passivhaus Airtightness Testing Important for a Passive House Premium?

For Passivhaus certification, a stringent air leakage test is required. Airtightness testing ensures the building envelope (walls, roof, floor) is as close to leak-proof as possible. This minimises drafts, heat loss, and reliance on heating systems.

With our experience and building energy expertise, our team was well-equipped to ensure that this ambitious Passive House premium project met and exceeded these stringent criteria.

Passivhaus Air Tightness Testing: Our Role in The Grand Designs Project

Our team of experts, led by Managing Director Jack Allen, a seasoned expert in building energy solutions, played a vital role in ensuring the success of this groundbreaking project.

The meticulous Passivhaus air tightness testing process involved assessing and sealing every nook and cranny of the Passivhaus structure, ensuring it met the rigorous standards required for certification.

Jack Allen, our Managing Director, on site at the Passivhaus

Our appearance showcased not only the technical prowess of our team but also our commitment to driving innovation in sustainable construction. The air tightness testing process became a visual testament to the meticulous care and attention we bring to each project, especially when it comes to pioneering endeavours like the UK’s first Passivhaus premium.

Impact on Eco-Conscious Living

As the episode unfolded, viewers witnessed the intersection of cutting-edge technology and environmental responsibility. Our company’s role in ensuring the airtight integrity of the Passivhaus not only contributed to the success of the project, but also underscored the importance of energy-efficient building practices in the broader context of sustainable living.


Being featured on Grand Designs for our involvement in the UK’s first Passive House premium was a proud moment for our company. It highlighted not only our technical prowess but also our dedication to pushing the boundaries of energy efficiency. As we continue to champion eco-conscious living, we look forward to more opportunities to showcase how our building energy experts are shaping the future of sustainable construction.

Are you ready to build a super-efficient Passivhaus home? Let us help you achieve the highest levels of energy efficiency in your home – contact us today for a quote on our air tightness testing services.

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