© Copyright CalCERTS, Inc. 2019
Code Cycle: 2016 and 2019 Standards
Q: Can you direct me to the energy code section that states an exception for full width headers being exempt for needing to be insulated? I have read the code with the energy commission and they also agree that it does not exist under the 2016 code, and for QII credit all exterior wall headers must be insulated.
A: This has been recently addressed and the CEC has clarified that a QII credit cannot be claimed for non-insulated headers. If you choose to use full width uninsulated headers, and if you choose to model QII, you need continuous insulation on the wall to claim the credit.
There is a reference in 2016 RCM 18.104.22.168 section (A.14) that indicates this is allowed, but the CEC has clarified that this is a carryover from 2013 and does not apply in the 2016 Standards.
2019 Reference Appendices Excerpts:
Batt and Blanket RA22.214.171.124.9 Special Situations--Window and Door Headers
(a) All single-member window and door headers shall be insulated to a minimum of R-3 for a 2x4 framing, or equivalent width, and a minimum of R-5 for all other assemblies. Insulation is to be placed between the interior face of the header and inside surface of the interior wall finish.
(b) No header insulation is required for single-member headers that are the same width as the wall,
provided that the entire wall has at least R-2 insulation.
These requirements apply to all insulation types (e.g. Loose fill, Rigid Board, ccSPF, SIP's, and ICF's).