The Hamlin Gardens project in Exeter marks a milestone for Nevada Construction as our first Passivhaus development. This innovative scheme involved constructing 21 energy-efficient apartments designed to meet the stringent requirements of Passivhaus Classic certification while also aligning with Building Biology IBN principles.

Achieving Passivhaus standards presented significant technical challenges, particularly in maintaining airtightness across the building’s envelope. With over 110 structural openings and 30 service penetrations, careful planning and execution were essential. Our team employed airtight membranes, tapes, and multiple layers of traditional hardwall and skim to ensure compliance with stringent airtightness requirements. Additional measures, including MVHR systems and thermal, solar gain, and humidity calculations, were integrated into the design to optimise performance. Throughout construction, quality checks were prioritised to identify and address potential weaknesses in the airtight envelope. Complex design elements, such as balconies and terraces, posed challenges, but these provided valuable lessons for future projects. By simplifying designs, engaging experienced subcontractors, and maintaining consistent construction methods, the team has established best practices for sustainable construction.

Hamlin Gardens provides 21 new affordable apartments, delivering much-needed sustainable housing in Exeter. The Passivhaus design ensures long-term energy efficiency, significantly reducing heating and cooling costs for residents. Enhanced indoor air quality, achieved through MVHR systems and healthy building principles, prioritises occupant wellbeing. In addition to its environmental benefits, the project aligns with Exeter City Council’s sustainability objectives, setting a precedent for future low-energy developments in the region. Lessons learned from this scheme will inform our approach to future sustainable builds, ensuring continued success in the growing field of Passivhaus construction.