About the event

Building a Passivhaus is never easy. Add six neighbours, a compact site, narrow south frontage, an elevated and exposed location, conservation area planning constraints, arboriculture, ecological, and archaeological restrictions into the mix, and you get a flavour of the challenges overcome by CaSA Architects in delivering this low energy home in Marshfield.

CaSA Architects will guide you around the finished house and present the design process from concept through to realisation on site, explaining how they overcame the challenges of planning, technical design and Passivhaus certification, and the lessons learnt.

They will outline the thermal performance predicted using PHPP compared to actual performance data, and the client will be on hand to talk and answer questions about their experience of living in a Passivhaus.

Light refreshments will be provided.

Technical project details

• Materials used – natural stone, natural slate and durable natural timber with timber/ aluminium composite windows and doors 
• Structure - timber frame, ‘stick built’ on site 
• A mixture of insulation materials were used from blown cellulose in the walls and the flat roof, mineral fibre in the loft, EPS in the floors with compac foam at thermal bridges and perinsul blocks to plinth walls 
• Air tightness of 0.6 achieved using smartply along with membranes and tapes 
• M&E includes – PVs with battery storage, air source heat pump, MVHR and smart controls for lighting and blinds 
• Shading design to prevent overheating is a mixture of fixed shading and external blinds 

About the speakers

Ian Walker RIBA RIAS ARB DipArch BA Hons, Director, CaSA Architects 

Ian worked in Edinburgh for 18 years before moving to Bath and forming CaSA Architects with Adam Dennes. During his career he has developed a profound commitment to designing buildings in a sustainable way. Ian aims to create buildings and places that integrate environmental sustainability with innovation and beauty; touching hearts and souls deeply whilst touching the earth lightly.