Wash. Admin. Code § 246-359-330 – Roof framing ventilation for wood framed construction and concrete masonry units (CMU) | Midpage
246-359-330
Wash. Admin. Code § 246-359-330
Roof framing ventilation for wood framed construction and concrete masonry units (CMU)
Effective Feb 18, 1999WSR 99-03-065RCW 70.114A.081HEALTH, DEPARTMENT OF
(1) Ventilation must be provided for enclosed roof framing spaces by providing sixteen-mesh screened openings at:
(a) The eaves;
(b) The gable ends;
(c) The ridge; or
(d) Any combination of (a) through (c) of this subsection.
(2) The minimum amount of ventilation openings must be at the rate of one square foot of net free opening for every three-hundred square feet of attic area.