27/08/2026
Most homeowners will never see the airtightness layer once the house is finished, but they will notice if it has not been done properly.
Gaps around windows, doors or where the walls meet the slab can leave a home feeling draughty and make the heating and cooling work harder.
At our West Pymble Passive House project, we check these junctions before they are covered. The materials change from one area to the next, so the connections need to be worked out properly and then tested.
If you are building, ask your builder to show you how the air barrier connects around the home. It is much easier to get right during construction than after the walls are closed.