The goal of tightening up a house is to balance natural air exchange with controlled ventilation to ensure an optimal level of efficiency and indoor air quality.
Most older homes can benefit from significant air sealing before approaching the point where tightness becomes a concern. Many newer homes have specific air leakage problems that can be strategically targeted. In either case, the most important first step before embarking on any air sealing improvements is to check whether combustion equipment in the home (such as furnaces and water heaters) are operating and venting safely, without generating and releasing carbon monoxide into the home.
The blower door test will determine just how tight your home is at the time of inspection, and we will look at your current ventilation systems to determine your best options. Finally, these tests will be repeated after the completion of any significant energy upgrades in your home.