Measuring Airtightness

Many weak spots in the building fabric, such as cracks, gaps or holes – are easy to spot. Obvious draughts can also be easily pinpointed by the layperson, either using a wet finger or by the strategic positioning of tealight candles.

Once air flows are recognised, they can be measured exactly. However, to identify and locate all problem areas and to measure airtightness precisely, requires a more sophisticated approach, using the Blower Door Test >>