The Council's Policies and Procedures, in WAC 51-04-060, allows the Council to issue opinions (interpretations) relating to the codes at the request of a local or state official, or their designee, responsible for implementation and enforcement of the specific code provision on which the opinion (interpretation) is requested. For the Council to provide a formal opinion (interpretation), a letter requesting the opinion (interpretation) needs to be submitted by a code official. The final opinions (interpretations) of the Council are advisory only. Opinions (interpretations) that have been finalized are provided through the links to the left.
Some of the opinions (interpretations) refer to illustrations, diagrams, and attached documentation. These supporting documents are not posted on the Web. If you would like a copy of a supporting document please request it from Council Staff.
| Year | Interpretation Number | Code Section Number | Code | Edition |
|---|---|---|---|---|
| 2022 | 22-01 | R402.2.5 / Table R402.1.3 Mass Walls | WA State Energy Code-Residential | 2018 |
| 2021 | 21-10 | R406, Additional Energy Efficiency Requirements | WA State Energy Code-Residential | 2018 |
| 2021 | 21-09 | R402.4.2, Fireplaces (Air leakage) | WA State Energy Code-Residential | 2018 |
| 2021 | 21-03 | C408.3 Unvented Crawl Space | WA State Energy Code-Residential | 2018 |
| 2021 | 21-01 | R405 Simulated Performance Alternative | WA State Energy Code-Residential | 2018 |
| 2020 | 20-14 | C406.2 / R406.3 H/ERV efficiency | WA State Energy Code-Residential | 2018 |
| 2020 | 20-13 | R402.4.1.2, Table R406.3, air infiltration | WA State Energy Code-Residential | 2018 |
| 2020 | 20-12 | Table R406.3, Appliance credit 7.1 | WA State Energy Code-Residential | 2018 |
| 2020 | 20-11 | Table R406.2, Fuel normalization credits | WA State Energy Code-Residential | 2018 |
| 2020 | 20-02 | WSEC C404.5 and R403.5.5 | WA State Energy Code-Residential | 2015 |
| 2019 | 19-04 | Table R406.2, Additional efficiency credits | WA State Energy Code-Residential | 2015 |
| 2018 | 18-04 | R403.7.1, Electric resistance heat | WA State Energy Code-Residential | 2015 |
| 2017 | 17-21 | R202, Def. of Residential in relation to accessory bldgs. | WA State Energy Code-Residential | 2015 |
| 2016 | 16-14 | Table R406.2 | WA State Energy Code-Residential | |
| 2016 | 16-13 | Table R406.2 | WA State Energy Code-Residential | |
| 2016 | 16-08 | R402.2.7, Floor insulation | WA State Energy Code-Residential | |
| 2013 | 13-15 | R403.4.2 Pipe insulation | WA State Energy Code-Residential | |
| 2011 | 11-19 | 503.8.1, Ductless Heat Pump Thermostatic Controls | WA State Energy Code-Residential |