Effective July 1st, 2018 the standard three-foot setback rule will be changed in California. The goal of this adjustment is to increase the amount of solar one can fit on the roof, while maintaining fire safety requirements.
Some key points to take away from this revision are the following:
• Carports, shade structures, flat roofs, and detached garages are still exempt from PV array pathways and ridge setbacks.
• Roof setbacks from ridge for ventilation relaxed from 36 inches to 18 inches for solar systems that take up less than 1/3 of the plan view total roof area.
• For homes with sprinkler systems, if the system takes up less than 2/3 of the plan view total roof area, the setback for ridge ventilation is also relaxed to 18 inches.
• Follow the diagrams attached, but in general two pathways on each roof section reduced to one.
• In some cases, access pathways for roof faces with PV may be on roof faces adjacent to the roof face with PV modules.
• Roofs under windows now require 36-inch-wide access pathway.
Special thanks to CALSSA (formerly CalSEIA) for the images and information about this local solar building code update.
This is a sample. For the full slide deck and more information, please visit CALSSA