The 2018 IRC/IECC requires two tests at the end of the construction process:
The building MUST PASS these tests before final occupancy approval can occur.
If a house fails one or both tests, remediation can be very expensive. It might require the removal of drywall to access leakage points in hidden attics and exterior walls.
Avoiding failures requires a systematic approach to residential projects that wasn't required before this testing became mandatory. Getting the details right up front can eliminate a lot of headaches, delays, and expense.
