Simon from Proclima came out to the Parklands House today and tested the airtightness of the house. The test calculates the air leakage when the house is pressurised and depressurised. The house achieved an average result of 0.8 air changes per hour. This is very close to Passive House standard. Congratulations to the team at Third Little Pig for achieving a building envelope that performs so well particularly that tricky roof. This result is particularly surprising given we still have aluminium windows. The team at Raylight have worked hard to put in good seals and reduce the air leakage where possible. We have also use Proclima tape on the back of the windows at the corners to seal help reduce the leakage at the joins and also where the aluminium extrusion screws to the magroc. The magroc panels joins have all been taped on the outside again using Proclima tape. Below the blower test result and some photos of Simon talking to the group today. Blower Door Test 20 Lamorna Rd. In the background you can see the red canvas over the external door opening this houses the fan and electronics that does all the work.