When must pre and post-installation blower door tests be included in the work scope?

The inclusion of pre and post-installation blower door tests in the work scope is critical when air sealing or enclosed cavity insulation that represents 15% or more of the total area is addressed. This testing provides an essential measure of the air tightness of a building, which is particularly relevant when significant modifications that impact air leakage characteristics are made, such as extensive air sealing or substantial insulation work.

By performing these tests before and after the work, you can quantify the effectiveness of the air sealing measures taken and ensure that the building achieves improved energy efficiency and indoor air quality. This process is vital not only for compliance with building codes and standards but also for executing successful energy efficiency upgrades.

Making these tests mandatory in such scenarios ensures that the enhancements made will lead to tangible improvements in energy performance and comfort, while also safeguarding against potential issues related to excessive sealing which could lead to indoor air quality problems if not properly managed.