Passivhaus Affiliate

Technical Guidance - Good practice guide to airtightness

Category: Guidance

The airtightness target of 0.6 ACH is key to the energy efficiency, comfort and quality of a Passivhaus building. This Good Practice Guide to Airtightness demystifies the process of achieving an airtight building, and will help all project teams successfully pass their airtightness test through careful design, communication and detailing on site. It provides general guidance on the design, procurement and installation of air barriers for any building that is intended to be airtight, and is aimed at construction professionals involved in Passivhaus developments. Architects, architectural technicians, engineers, design managers, project managers, contractors and consultants will all find it useful. 

The guide is split into three main sections.  The first is a brief overview of the main issues and considerations around airtightness - an ‘Introduction to Airtightness’ to help ease the reader into the more in-depth content in Section 2.

Section 2 provides detailed guidance on airtightness considerations by RIBA stage, and should ideally be applied stage-by-stage in an airtightness project. Not all of this guidance will be relevant for smaller projects, but it is considered to be best practice.

Section 3 is aimed more at designers of airtightness details and contains detailed information, examples and tips for common junctions and construction details.


Good practice guide to airtightness [PDF]                 

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