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 website (opens as PDF).