We chose timber frame over a masonry construction as it was seen as a much easier way to achieve the crucial 0.6 air changes per hour @50pascal air tightness test, todays building standards' ask for a minimum of 10m³/hr. At 50 pascals of air pressure, this will simulate an average 20mph wind around the building

We don't tolerate drafty cars, why do we tolerate drafty houses?

On the 10th of Sept we reached the crucial 0.6ACH. We pushed a little further to gain some contingency and got down to 0.54 in the positive and 0.55 in the negative, leaving an average of 0.545. A very good result considering the area to volume ratio was so high, meaning that there were many lateral junctions to get air tight.