PDFWAC 51-11C-61013

Section A101.3—Air films.

A101.3 Air films. Default R-values used for air films shall be as follows:
R-Value
Condition
0.17
All exterior surfaces
0.61
Interior horizontal surfaces, heat flow up
0.92
Interior horizontal surfaces, heat flow down
0.68
Interior vertical surfaces
[Statutory Authority: RCW 19.27A.020, 19.27A.025 and chapters 19.27 and 34.05 RCW. WSR 13-04-056, § 51-11C-61013, filed 2/1/13, effective 7/1/13.]