Improving airtightness

Airtightness work consists in caulking the areas most susceptible of having air leaks in order to avoid air intake (cold air infiltration) on the one hand, and heat loss (warm air exfiltration) on the other hand.

The airtightness level is measured during a blower door test. It is expressed in the rate of air change per hour (ACH). The evaluation report of your home will indicate this rate as well as the rate you could reach by carrying out airtightness work.

Financial assistance is granted based on whether the air infiltration reduction target indicated in your evaluation report is reached or exceeded.