Cool roofing in Woodland Hills means a roof surface with high solar reflectance and thermal emittance, and in this part of the San Fernando Valley it is more than a comfort choice: Woodland Hills is in California building climate zone 9, where replacing more than half of a home’s roof triggers the state’s cool-roof requirement unless an allowed exception applies. The benefits are a cooler roof and attic and less heat pushed into the rooms below. Below, seven common beliefs checked against the code and the rating system. For a cool roof estimate, call NEMA Roofing at 818-528-6412.
Myth 1: A cool roof has to be white
Not on a sloped roof. The California Energy Commission notes that cool roofs come in a wide range of colors, including light, dark and vibrant shades, because cool pigments reflect the invisible infrared part of sunlight while showing the color you chose. Tan, gray, terracotta and even darker products carry ratings. What counts is the aged solar reflectance and thermal emittance listed for the exact product in the Cool Roof Rating Council (CRRC) directory. White remains the norm on flat roofs, where the required values are much higher.
Myth 2: Cool roofing is optional in Woodland Hills
For a reroof it often is not. Woodland Hills ZIP codes 91364 and 91367 are in climate zone 9. Under the 2025 energy code, in force since January 1, 2026, a residential steep-slope reroof that replaces more than 50 percent of the roof in zones 4 and 8 through 15 must meet an aged solar reflectance of at least 0.20 and thermal emittance of at least 0.75, or a solar reflectance index of at least 16. Low-slope reroofs must meet 0.63 and 0.75 (or an index of 75). Woodland Hills is part of the City of Los Angeles, and the Los Angeles Department of Building and Safety requires a CRRC-certified cool roof product on residential roof replacement over 50 percent of the roof area.
Myth 3: There is no way around the requirement
There are defined exceptions for steep-slope reroofs, for example a ceiling already insulated to R-38 (or a U-factor of 0.025 or lower), a qualifying radiant barrier in the attic, no ducts in the attic in climate zone 9, or at least R-2 insulation at the roof deck. Roof area covered by building-integrated solar panels is exempt too (rack-mounted panels do not exempt the roof under them). Whether your house qualifies is worth checking before choosing a product, because it can open up colors that would not otherwise meet the values.
Myth 4: A cool roof only matters in summer
Its effect is largest on hot, sunny days, but it works whenever the sun is on the roof. The Energy Commission lists the benefits as a cooler house, more comfort, lower roof and attic temperatures, less need for air conditioning, and a roof that can last longer than a conventional one. Ask how the product performs for your house rather than relying on rules of thumb.
Myth 5: Any color labeled “cool” performs the same
Ratings vary widely between products and colors that look alike, and dirt lowers reflectance over time. That is why the code and LADBS rely on aged values from the CRRC directory, not the initial number or a marketing name. Ask for the CRRC product ID of the exact color on your estimate.
Myth 6: Cool roofing ignores fire safety
The two go together. Parts of Woodland Hills lie in a Very High Fire Hazard Severity Zone, where LADBS requires a Class A roof covering. Many cool-rated shingles, most tile and most metal roof systems are available as Class A assemblies, so fire rating and reflectance can usually be met with one product. Confirm both listings for the exact system.
Myth 7: You can just paint the existing roof
For flat and low-slope roofs, a rated reflective coating over a sound membrane is a real option. For asphalt shingles and tile, the color comes from the product itself, and coating them is not a substitute for choosing a cool-rated product when the roof is replaced; check the manufacturer’s guidance first. See how cool roof colors are rated for how to compare products.
What should a Woodland Hills homeowner do first?
- Confirm how much of the roof will be replaced: over half triggers the cool-roof rule.
- Check the attic: insulation level, radiant barrier and whether ducts run there, since they decide the exceptions.
- Check the fire hazard zone for your address.
- Shortlist products and colors with their CRRC aged values and Class A listing.
For related reading, see heat-reflective roofs in Woodland Hills and cool roofing vs. traditional roofing. Woodland Hills is one of NEMA Roofing’s five locations, alongside Tarzana, Downey, Oxnard and Santa Barbara, and we install cool roofs across Los Angeles, Ventura, Santa Barbara, Riverside and San Bernardino counties; see our Woodland Hills roofing page and cool roofing service. To check which cool roof fits your home, call NEMA Roofing at 818-528-6412.
