The Air Sealing Detail images are intended solely to help graphically demonstrate the air leakage provisions of section 402.4 of the 2012 IECC. It does not cover all air sealing location or techniques. Other code provisions may be applicable as well.

All AirSealing Detail Images courtesy of Southface. Reprinted with permission.

 

Multifamily

Cap and seal all chases, including chases for grouped utility lines and radon vents.
  1. Seal penetrations in mechanical closet, including penetrations for the:
    • Supply plenum
    • Outside air ventilation
    • Refrigerant line
    • Plumbing
    • Electrical
    • Gas fuel
  2. Seal band area at exterior sheathing side and all penetrations through band.
  3. Air-seal at drywall finishing for any wall adjacent to stairwell or elevator. Air-seal this gap at every change in floor level.
  4. Seal miscellaneous clustered penetrations through building envelope (e.g., refrigerant lines).

 

Mechanical Closet

Roof and Truss

Garage