The preferred method for reroof 50 or more of the roof being replaced is the prescriptive path which specifies the measures needed to comply with the code.
Roof tile title 24 aged solar reflectance climate zone 9.
Purchase solar roof at one of the lowest cost per watt of any national provider and take control of your monthly electricity bill.
The title 24 standards do not require a cool roof on a residence when energy compliance is achieved using the performance method.
A comparison between the way u s.
Since buildings are one of the major contributors to electricity demand the goal of title 24 is to reduce energy consumption in california for its energy future.
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.
Environmental protection agency s epa s energy star program california s title 24 and the leadership in energy and environmental design leed rating system qualify a cool roof in terms of solar reflectance sr and thermal emittance te or solar reflective index sri.
In our example we are using tile roofing with a weight greater than 5 lb sq.
On a steep slope roof greater than 2 12 and for climate zone 8 the cool roof requirements are an aged solar reflectance of 0 15 and a thermal emittance of 0 75.
The roofing project is in an affected california climate zone.
Reflective surfaces can deliver high solar reflectance the ability to reflect the visible infrared and ultraviolet wavelengths of the sun reducing heat transfer to the surface and high thermal emittance the ability to radiate absorbed or non reflected solar energy.
That is your cool roof specification for your roofing product.
For climate zones 10 15 the code requires a cool roof to reduce the peak energy demand in hotter climates.
Solar roof is comparable in price to a typical roof with solar panels.
To see which climate zone your project is in and the requirements associated with your building structure visit the cec s website.
Any replacement recovering or recoating of the exterior surface of the existing roof where greater than 50 of the existing roof surface area or 2 000.
Title 24 cool roof regulations are in effect for california homes when.
California s title 24 energy standards address the energy efficiency of new construction of and additions and alterations to homes and commercial buildings.
Solar roof is comparable in price to a typical roof with solar panels.
Reflective surfaces are a form of geoengineering.
Homes in zones 10 15 must meet cool roof standards.
