Section 51-11C-40213 - Section C402.1.3-Insulation component R-value methodC402.1.3Insulation component R-value-based method.Building thermal envelope opaque assemblies shall comply with the requirements of Section C402.2 based on the climate zone specified in Chapter 3. For opaque portions of the building thermal envelope intended to comply on an insulation component R-value basis, the R-values for cavity insulation and continuous insulation shall not be less than that specified in Table C402.1.3. Where cavity insulation is installed in multiple layers, the cavity insulation R-values shall be summed to determine compliance with the cavity insulation R-value requirements. Where continuous insulation is installed in multiple layers, the continuous insulation R-values shall be summed to determine compliance with the continuous insulation R-value requirements. Cavity insulation R-values shall not be used to determine compliance with the continuous insulation R-value requirements in Table C402.1.3. Commercial buildings or portions of commercial buildings enclosing Group R occupancies shall use the R-values from the "Group R" column of Table C402.1.3. Commercial buildings or portions of commercial buildings enclosing occupancies other than Group R shall use the R-values from the "All other" column of Table C402.1.3.Wash. Admin. Code § 51-11C-40213
Amended by WSR 14-24-122, Filed 12/3/2014, effective 1/3/2015Amended by WSR 16-03-072, Filed 1/19/2016, effective 7/1/2016Amended by WSR 16-13-089, Filed 6/15/2016, effective 7/16/2016Amended by WSR 19-24-040, Filed 11/26/2019, effective 7/1/2020Amended by WSR 22-14-091, Filed 7/1/2022, effective 7/1/2023Statutory Authority: RCW 19.27A.020, 19.27A.025 and chapters 19.27 and 34.05 RCW. 13-04-056, § 51-11C-40213, filed 2/1/13, effective 7/1/13.