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There are early adopter
counties in California that are requiring radiant barriers in their building
codes. In addition there are cities in Texas such as Houston that are
promoting the use of a radiant barrier in their building techniques. Here
are some questions and answers about a radiant barrier and how they can
be employed.
Q: What
is a radiant barrier?
A: A radiant barrier impedes the transfer of heat through a specific
area. There are many types of radiant barriers and the one you are probably
most familiar with is insulation. Insulation impedes the transfer of heat
through a surface. Insulation is rated with an R value which gives you
an indication on how much heat transfer is impeded. Insulation is tested
in inches of material to determine the R value. Another type of radiant
barrier is my fluoropolymer coating with added hollow ceramic micro-spheres.
In accordance with FTC (Federal Trade Commission) rules
we cannot give an R value with our coating due to the extremely small
thickness. Remember insulation is tested in inches. In most instances
1/1000" or 1/500" will achieve significant heat transfer reduction
through a roof, wall, or other structure. With insulation studs and windows
provide a parallel path for heat to transfer. Using a coating eliminates
this parallel path. See our Energy Savings
page for more information. Our fluoropolymers are fire resistant.
Q: Where
can I use a radiant barrier?
A: You can use a radiant barrier on top of your existing roof,
under the underlayment, inside attic on roofing material, on interior
walls replacing paint. We have 0 (zero) VOC product, Fluoroblend, which
complies with LEED requirements.
Q: Why
would I coat my walls instead of painting?
A: Paint, over time, fades with contact to sunlight. Coating your
interior walls with our fluoropolymer coating will not fade, chalk, or
yellow. You can wash the coating with any commercial cleaner and will
not affect the color. In addition our fluoropolymer coating will clean
the air in the room. We add an antimicrobial
additive to our coating which will kill all virus' and bacteria present
in the room making for a more enjoyable environment. In rooms like the
bathroom which sometimes might have unpleasant smells, the antimicrobial
will remove the bacteria that causes the smell. In remote situations like
truck stops or highway road stops, using the Fluoroblend as an interior
coating will reduce maintenance costs dramatically. In addition our coating
will not burn.
Q. Is
Silver Paint A Radiant Barrier?
A. No. ASTM defines these products as Interior Radiant Control
Coatings (IRCCs), which carry an emittance value of .25 or less. They
do not qualify as radiant barriers because they do not meet the necessary
emittance values required by the State of California. The emittance value
of Superior Shield products SuperShield and Fluoroblend is .92.
Q. Why
Is Radiant Barrier A Cost- Efficient Way To Meet Code?
A. Next Energy modeling software programs indicate that a radiant
barrier can improve Title 24 compliance margins significantlyfrom
5% to 16%for both single-family and multifamily homes. In addition,
third-party data* shows that radiant barrier sheathing is one of the top
three energy-efficient technologies in new home construction applications
on the market when it comes to performance, cost and return on investment.
* Source: Independent Study by ConSol, 2010.
Q. Heres
Why A Radiant Barrier Is So Effective?
A. Blocks up to 97% of radiant heat in the panel from being
transferred into the attic
Lowers attic temperatures by as much as 30° F
Lowers monthly air conditioning bills by as much as 17%
Cold sprayed radiant barriers require very little additional labor
to install
Q. Are Radiant
Barriers Recognized By Building Codes?
A. Yes. Radiant barriers are recognized by the State of California
as an energy-efficient technology and are included in Title 24. Radiant
barriers are required if one builds using the prescriptive packages for
Climate Zones 2, 4 and 815. They are one of the most cost-effective
ways to build if one is using the performance method to comply with Title
24. Radiant barriers are recognized in State of California approved compliance
software programs, which compare a proposed homes estimated energy
efficiency to a baseline home design.
Q. Are there
other areas promoting the use of radiant barriers in their building codes?
A. YES. Houston Texas is also an early adopter of these building
techniques. Although not required as part of the EPAs ENERGY STAR®
Home qualification guidelines, radiant barriers at the roof can significantly
improve the HERS Index and help a home qualify for the ENERGY STAR label.
When considering the hot, sunny Houston weather, radiant barriers have
steadily gained in popularity among the local homebuilders. This
article examines radiant barriers and why you should consider installing
them.
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