Passivhaus Affiliate

Standard Members

Membership of the Passivhaus Trust is open to anyone and does not necessarily imply achievement of the Passivhaus standard for buildings or components, or attainment of Passivhaus-related qualifications. Members of the Passivhaus Trust listed include architects, consultants, contractors, manufacturers and other industry professionals, as well as individuals, who support the work of the Trust in promoting the Standard in the UK.

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i3PT Certification


Iain Clavadetscher


Iain Clavadetscher works with CHMRP Architects work in close collaboration with his clients to create bespoke solutions developed from an appreciation of physical and historical context. The success at which this is achieved is borne out by the fact that over 80% of his work is derived from repeat commissions.

Ian Van Duivenbode


Ian Waters Design Ltd

St Ives

Icynene Inc


The Icynene Insulation System is a soft, flexible, breathable, foam insulation and air barrier. Sprayed as a liquid Icynene expands to 100 times its initial volume in seconds. Icynene’s unique formulation sets it apart from other insulation products offering many advantages over traditional insulation materials and more modern alternatives. Icynene contains no HFC’s, CFC’s HFA or HCFC’s and it remains soft and flexible accommodating any normal expansion contraction or movement within a building. The Icynene Insulation System is 100% water blown containing no toxic chemicals and will deliver the performance you can count on for a lifetime of savings and comfort.


Individual Member


Individual member


Inside Outside Engineering Ltd


We design the mechanical and electrical services to make the *Inside* of the building work best. We feel that this starts with understanding the local climate, the *Outside*, and how the shell of the building acts as a filter to that environment. We advise on how to optimise the building form and design from the get-go. The best results can be achieved when we bring the whole scheme together to create comfortable & desirable spaces for living.


Insulated Floors Ltd



Intelligent Membranes & Windows


Intelligent membranes are liquid applied membrane suppliers and installers. Our Passive Purple is an airtight intelligent liquid vapour control that gets 0.03 ach on any substrate it is adhered to. It is BBA CERTIFIED and Passivhaus Certified. Passive Purple External is our waterproof facade membrane that is vapour open. We also have our own range of Passivhaus certified windows called Artemis.