Code Amendments: Washington

  • Table C402.1.4 U-factors, footnote (d)
    Update: With the 3/15/24 effective date of the 2021 Washington State Energy Code, note that the concrete masonry mass wall exception is still in place without change. It applies to many commercial building types where the use of integral insulated, single-wythe CMU walls is desired. Please click here to view… Read more: Table C402.1.4 U-factors, footnote (d)
  • Table C402.1.3 R-Value, footnote (c)
    Update: With the 3/15/24 effective date of the 2021 Washington State Energy Code, note that the concrete masonry mass wall exception is still in place without change. It applies to many commercial building types where the use of integral insulated, single-wythe CMU walls is desired. Please click here to view… Read more: Table C402.1.3 R-Value, footnote (c)
  • Beneficial Mass Wall Credits Will Remain in Washington Energy Codes
    If you are designing a gymnasium, big-box retail, or one of several other building types, you can still utilize integral-insulated exposed single-wythe concrete masonry (CMU) walls for code compliance. This cost-effective wall system remains a prescriptive path design option in the latest Washington and Oregon energy codes.