Bitesize: Construction

How do I build a Passivhaus? How is it different from normal construction? This half-day session answers these questions, along with some specific guidance on achieving the level of airtightness and thermal bridge-free construction required by the standard.

Airtightness, convective bypass and thermal bridging are discussed in relation to common constructions. Insulation materials are shown and their properties discussed, singling out those that are effective in damp and load bearing situations. Suitable airtightness materials are discussed and shown, and the necessity of an airtightness strategy discussed.

The session stresses the preferred option of designing out thermal bridges rather than using expensive load bearing insulation. Along with avoiding thermal bridging, keeping the airtightness layer simple on plan and site is stressed. You will get a chance to try your hand at detailing some common construction elements in a small group exercise.

Finally, but not least, a look at the contractual side and suggestions for ways responsibility can be allocated to carry the Passivhaus principles through to the on-site teams.