Building site measurements for predicting air infiltration rates.

Examines the sensitivity of the predicted air infiltration rate to measured building air tightness data and the wind exposure index determined from site inspection. Presents results of air tightness tests in New Zealand houses, which indicate the range of leakage resistance for components, for solid materials (such as wall and ceiling lining materials) and for cracks separating major components such as floors and walls. Discusses the distribution of leakage openings in relation to the driving forces of wind and stack induced air flows, and also in relation to New Zealand styles of house building.