Initivo provide Air Tightness Testing and consultancy services, for low energy/Passivhaus projects.

These typically require a very low air permeability target of 0.6m3, with testing in accordance with ATTMA TSL4, which suggests three stage testing:

  • Once the initial air barrier sealing works are completed
  • Once the secondary fix works are completed
  • At competition


As the drive towards nett zero progresses, more projects are coming under the Passivhaus scheme.

We can help with:

  • Drawing reviews at design stage
  • Site audits
  • Leakage investigation
  • Final testing

Low Energy