PDFWAC 246-359-320
Roof covering materials for wood framed construction and concrete masonry units (CMU).
Roof sheathing must be protected by installing a material that has been designed as a roofing covering product. Installation of the selected roof covering material must be according to manufacturer's instructions and industry standards.
[Statutory Authority: RCW 70.114A.081. WSR 99-03-065, ยง 246-359-320, filed 1/18/99, effective 2/18/99.]