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What Makes a House Airtight?
The continuous air barrier explained — floor, walls, roof, windows, membranes, tapes and penetrations — and how it's all verified with a blower door test.
Preparing for a Blower Door Test
The definitive Australian checklist for builders and homeowners — what to do, what to leave alone, and a printable version.
Can You Fail a Blower Door Test?
There's no universal pass mark — it depends on your target. How targets are set, common leak areas, and what happens if you miss one.
How to Pass a Blower Door Test
A good result is built, not tested for. The air barrier concept, construction sequencing and the details that decide the result.
Why Every New Home Should Have a Blower Door Test
Not just for Passive House — the case for measuring airtightness on any new build, and what happens if you don't.
How Airtight Is the Average Australian Home?
CSIRO's 2024 study tested 233 new homes with a blower door. What it found, how new builds compare to older homes, and where your home might sit.
Common Air Leaks Found During Blower Door Testing
Real field photos from South Australian tests: the eight places air leakage turns up most — sliding doors, exhaust fans, ceiling hatches, service penetrations and more.
What Is a Blower Door Test?
How airtightness is measured, how a test is carried out, and what the result actually tells you about your building envelope.
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