The 2009 International Energy Conservation Code (IECC) is the energy code enforced for all buildings. The 2009 IECC states that all new buildings and additions, residential and commercial, are required to have an air leakage test of the building thermal envelope. There are two options for the testing, a blower door test or a visual inspection. All ductwork is required to be sealed. For more information about changes in the 2009 IECC, see 2009 IECC Overview of Changes.
Residential builders have the option of performing the visual air leakage inspection of their homes themselves. Builders must submit a copy of their certification with their permit application if they plan to perform the air leakage inspection. Builders must also complete the inspection certificate and submit it to the permit office before they can receive their certificate of occupancy. See 2009 IECC Compliance Requirements for more information. Please note, City building inspectors will perform the air leakage visual inspection along with the framing all roughs inspection if the builder does not choose to do so.
All residential plan submittals must include the following for review and approval:
- Window U-factors, R-values and window Solar Heat Gain Coefficients (SHGC) should be provided on the construction drawings. The manufacturer’s certification is to be with the windows at the time of the framing inspection.
- R-values for all insulation should be noted.
- Mechanical calculations must also be submitted with plans. ACCA Manual J and D shall be used for the mechanical calculations.
- ResCheck - A ResCheck form showing energy code information is required for any new construction or addition. A ResCheck form can be completed online and printed out by going to https://energycode.pnl.gov/REScheckWeb/.
- Copy of builder's air leakage inspection certification (if applicable)
IECC residential insulation requirements are:
Minimum acceptable levels:
|Wood Frame Walls||Minimum acceptable levels:
|Floors||Minimum acceptable levels:
|Crawl Space Walls||Minimum acceptable levels:
R-5/13 ( first value is for walls with continuous insulation, the second is for insulation placed in a framing cavity (stud walls). Either method is acceptable.
|Ductwork||Minimum acceptable levels:
R-8 for ductwork outside of conditioned space.
R-6 for ducts inside floor trusses.
Ducts completely inside the building thermal envelope need not be insulated.
|Windows & Skylights||
Maximum acceptable levels:
The 2012 International Residential Code currently in effect requires a water-resistive barrier applied over studs or sheathing of all exterior walls. There is no exception for vinyl siding or other coverings. One layer of No. 15 asphalt felt complying with ATM D 226 or other approved water resistive barrier that is free from breaks or holes may be used. The material is to be applied horizontally with the upper layer lapped over the lower layer not less than 2". Where joints occur, the material shall be lapped not less than 6" and shall be continuous to the top of the walls. It is not required under the paperbacked stucco lath when the paper backing is an approved weather-resistive sheathing paper.
The City will perform a water barrier inspection as well as a sheathing inspection. The water barrier inspection will be performed as part of the framing inspection. This will mean that the sheathing inspection is a separate inspection.
New commercial buildings and additions are required to have an air leakage test of the building thermal envelope. The two testing options listed above are available but the general contractor can not perform the test himself. City inspectors will perform the air leakage visual inspection along with the framing inspection.
COMcheck forms are required to be submitted at the time of building plan review. Visit www.engerycodes.gov for more information.