California Title 24 & Radiant Barriers
All RadiantGUARD® radiant
barrier and bubble insulation products have been licensed with the State of
California for Title 24 compliance.
contact us for our State of California Department of Consumer Affairs license
number for Title 24 radiant barrier qualification credit.
What is California Title
Energy efficiency reduced
energy costs, increases reliability and availability of electricity, and
reduces impacts to the environment. Therefore, energy efficiency standards
are important and necessary for California's energy future.
The 2005 Residential and
Non-Residential Standards are expected to reduce the electricity usage growth
by 478 gigawatt-hours per year and reduce gas usage growth by 8.8 million
therms per year.
When Are Radiant Barriers
REQUIRED Under Title 24 Standards?
There are two approaches to complying with the 2005
Residential and Non-Residential Standards. Using the prescriptive approach, each
must meet a prescribed minimum energy requirements and the total package must meet all of the requirements
for the climate region.
Using the performance method, the builder uses an approved computer model
to calculate the energy budget for the building.
Radiant barriers are required
for the following climate
zones with significant cooling loads when using the prescriptive
Zone 4, and
Zones 8 through 15
Allowed Methods of Installation
for Radiant Barriers
The California Energy Code
mandates radiant barriers be installed in one of the following methods:
Stapled to the underside
of the roof decking,
Draped over the truss
cords or rafters,
Stapled to the inside
of roof rafters, or
Stapled to the bottom
of the truss cords or rafters.
There must be a 1 1/2 inch
air space below the roof deck and an air space of 3 1/2 inches from the
insulation on the roof decking to allow ventilation air to flow between
the roof decking and top surface of the radiant barrier. A minimum
of 6 inches (measured horizontally) should be left at the roof peak to allow
hot air to escape from the air space between the roof decking and the top
surface of the radiant barrier.
Radiant barriers must be
installed on gable ends as well.
radiant barrier installation
techniques for installation guidance.