Is cool roof required in California?

In California, all new or replacement low-slope roofs are required by the building energy efficiency standards (Title 24) to be cool roofs, as are steep-slope roofs in several California climate zones.

What qualifies as a cool roof?

A cool roof is one that has been designed to reflect more sunlight and absorb less heat than a standard roof. Cool roofs can be made of a highly reflective type of paint, a sheet covering, or highly reflective tiles or shingles. Standard or dark roofs can reach temperatures of 150°F or more in the summer sun.

What is the best roof to keep house cool?

8 Roofing Materials To Keep Your Home Cool

  • Concrete Tiles. Concrete tiles have the same heat-reduction properties as terra-cotta, but are much less expensive.
  • EPDM Roofing Membrane. This type of material is a mouthful, and often goes by rubber roofing.
  • Metal Roofs.
  • Green Roofs.
  • Asphalt Shingles.
  • Slate Tiles.
  • Solar Panels.

What is a cool roof in California?

Cool Roof Shingles. Roofing products with high solar reflectance and thermal emittance are referred to as “cool roof”, which is the outer layer or exterior surface of a roof.

Are shake roofs legal in California?

The ban on cedar shake shingles in California is an understandable safety precaution. With many areas prone to violent wildfires, it is critical to do everything possible to prevent them. While before, this meant giving up that beautiful, wood shake look, that is no longer the case.

What is California cool code?

COOL roof code requirements in California are based on the Solar Reflectance Index (SRI). Various materials can be assigned an SRI value ranging from 0 to 100. The lower the SRI value, the hotter the material is likely to become in sunlight. Material with a higher SRI value will stay cooler in sunlight.

Does spraying your roof with water cool your house?

It’s that simple. Yes, water on the roof will help cool it. Cooling with liquid water running off from a sprinkler is not efficient, but evaporative cooling from a small amount of water (like a periodic sprinkle) is very efficient.

What roof is best for hot climate?

Better options for homeowners in warm climates are metal, slate, clay, or rubber shingles.

  • Begin Your Roof Replacement.
  • Metal roofs excel under extreme temperatures.
  • Slate roofing is made of stone, it is impervious to weather, sun, heat, and cold.

Is a metal roof a cool roof?

Cool metal roofing is defined as painted or coated metal products that reflect the sun’s energy to dissipate heat. Cool roofs help to reduce the heat that is transferred into the building, which can result in total cooling cost energy savings ranging from 7% to 15%, according to the Green Building Alliance.

Do you need a permit for a new roof in California?

2. Unless noted otherwise in this information bulletin, a building permit is not required for renewal of roof coverings on any building permitted by the California Building Code and the California Residential Code, where the existing roof structure, including roof diaphragm, is not altered.

Can you replace your own roof in California?

Installing a new roof yourself is not encouraged. If you are handy and have some roofing knowledge, then most likely you don’t even need to read this article. But if you are considering whether or not you can do this, you absolutely can.

How to get a cool roof in California?

California COOL Roof Code Requirements: Know Your Zone 1 The City of Los Angeles COOL Roof Code Requirements. First, for the City of Los Angeles, asphalt shingles must meet or exceed an SRI value of 16 for all new 2 Los Angeles County COOL Roof Code Requirements. 3 State of California COOL Roof Code Requirements.

Are there California Energy Code requirements for cool roofs?

The California Energy Commission has published two new brochures on the 2019 Energy Code: These brochures include information on the following requirements for cool roofs: For more information on Title 24, please visit

What kind of roof shingles are used in California?

In California, where many low-rise residential homes are subject to the requirements of Title 24, cool roof shingles have become a major trend in residential roofing. These asphalt shingles are manufactured with colored granules that contain special pigments that reflect IR light.

When did Los Angeles start requiring cool roofs?

And in December 2013, the Los Angeles City Council unanimously passed an update to the Municipal Building Code making it the first city to require residences to install cool roofs when newly constructed or with roof replacement.