During an inspection of an existing home, you notice that the ductwork is not properly sealed. What is the minimum requirement for ductwork sealing as per the 2024 International Residential Code?
- Seal all joints and connections with mastic.
- BSeal all joints and connections with tape.
- CSeal all joints and connections with foil tape.
- DSeal all joints and connections with weather stripping.
Exam tip
Mastic is the preferred method for sealing ductwork joints and connections.
Why A is correct
Section M1503.4 of the 2024 IRC specifies that all joints and connections in duct systems must be sealed with mastic to prevent air leakage.