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 Washington Administrative Code (Last Updated: November 23, 2016)
 Title 51. Enterprise Services, Department of (Building Code Council)
 Chapter 51-11C. State Building Code adoption and amendment of the 2015 edition of the International Energy Conservation Code, Commercial.

  Section 51-11C-61015. Section A101.5—Building materials.  

Latest version.
  • A101.5 Building materials. Default R-values used for building materials shall be as shown in Table A101.5.
    Table A101.5
    Default R-values for Building Materials
    a
    There is no credit for cavities that are open to outside air.
    b
    Air films do not apply to air cavities within an assembly.
    c
    For heat capacity for concrete and concrete masonry materials with densities other than the values listed in Table A101.5, see Tables A103.3.7.1 (1) through (3) or Tables A3.1B and A3.1C in ASHRAE/IESNA Standard 90.1.
    [Statutory Authority: RCW 19.27A.025, 19.27A.045, 19.27A.160 and 19.27.074. WSR 16-13-088, § 51-11C-61015, filed 6/15/16, effective 7/16/16. Statutory Authority: RCW 19.27A.025, 19.27A.160, and 19.27.074. WSR 16-03-072, § 51-11C-61015, filed 1/19/16, effective 7/1/16. Statutory Authority: RCW 19.27A.020, 19.27A.025 and chapters 19.27 and 34.05 RCW. WSR 13-04-056, § 51-11C-61015, filed 2/1/13, effective 7/1/13.]
RCW 19.27A.025, 19.27A.045, 19.27A.160 and 19.27.074. WSR 16-13-088, § 51-11C-61015, filed 6/15/16, effective 7/16/16. Statutory Authority: RCW 19.27A.025, 19.27A.160, and 19.27.074. WSR 16-03-072, § 51-11C-61015, filed 1/19/16, effective 7/1/16. Statutory Authority: RCW 19.27A.020, 19.27A.025 and chapters 19.27 and 34.05 RCW. WSR 13-04-056, § 51-11C-61015, filed 2/1/13, effective 7/1/13.