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 the Washington State Energy Code – Commercial 2021 Edition on the sbcc.wa.gov website (opens as PDF).

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 the Washington State Energy Code – Commercial 2021 Edition on the sbcc.wa.gov website (opens as PDF).

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.