The most well known type of reflective surface is the cool roof.
Roof tile title 24 aged solar reflectance climate zone 9.
Solar roof is comparable in price to a typical roof with solar panels.
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.
Homes in zones 10 15 must meet cool roof standards.
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.
Aged solar reflectance index of 20 or a minimum sri a sri of 16 requirements vary by zone depending on the building and the climate method.
Purchase solar roof at one of the lowest cost per watt of any national provider and take control of your monthly electricity bill.
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.
Reflective surfaces are a form of geoengineering.
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.
Title 24 cool roof regulations are in effect for california homes when.
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.
That is your cool roof specification for your roofing product.
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.
To see which climate zone your project is in and the requirements associated with your building structure visit the cec s website.
The title 24 standards do not require a cool roof on a residence when energy compliance is achieved using the performance method.
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.
California s building energy efficiency standards for residential and nonresidential buildings title 24 part 6 contains requirements for the thermal emittance three year aged reflectance and solar reflectance index sri of roofing materials used in new construction and re roofing projects.
A comparison between the way u s.
In our example we are using tile roofing with a weight greater than 5 lb sq.
