All our houses come with a ‘Blower door test’ completed at the final stage of construction.
What is a blower door test? Basically, it is a huge fan that depressurises your house and allows us to find all the small and tiny air gaps, and then eliminate them.
It is required by the National Construction Code that a new home be airtight to 10 AC (air changes, the lower the better) per m3/hr at 50 pascals. Although this is what you have paid for, there is no requirement to test this before your home is certified and handed over.