Energy / cool roof (Title 24)
Lancaster sits in California Energy Commission Climate Zone 14, a hot inland/desert zone. Under Title 24, Part 6, BOTH low-slope and steep-slope roofs here must use a cool-roof product when you replace 50% or more of the roof or about 1,000 sq ft: low-slope needs aged solar reflectance of at least 0.63 and thermal emittance of at least 0.75 (about SRI 75), and steep-slope (pitched) roofs need aged SR of at least 0.20 and TE 0.75 (about SRI 16). Small like-for-like repairs generally don't trigger it, and trade-offs like R-38 attic insulation or a radiant barrier can substitute in some cases. See the California Energy Commission standards and the CRRC directory for rated products.
Fire
Lancaster sits on the high-desert Antelope Valley floor, and most of the city isn't in a Very High Fire Hazard Severity Zone, so a standard Class A roof is typical; some western parcels near the foothills can be. Confirm your specific parcel. You can check any parcel on the CAL FIRE hazard-zone viewer.
Decking / sheathing
Many older Lancaster homes were built with spaced 1×6 “skip” sheathing under the original roof. For a modern shingle or tile system — and for a Class A assembly — that decking often has to be overlaid with solid sheathing, and any rotted boards replaced. We confirm exactly what your roof needs with a deck inspection at tear-off, not a guess.
Color & materials
Roof color isn't regulated by code. Where a cool roof is required you need a CRRC-rated product that meets the SRI — and those come in a wide range of colors, not just white.
Source: the City of Lancaster Building & Safety, the California Energy Commission, and CAL FIRE.
Roofing codes change and are parcel-specific — confirm with the City of Lancaster Building & Safety before your
project, or call us at (866) 685-3889 and we'll confirm it for you.
