| Reflective Roofing Products
States & Cities Change Building Codes
The benefits of using Reflective Roofing Products are rapidly coming to the
forefront. Many cities, states and the roofing industry as a whole
have embraced their use in
an effort to minimize the effects of Urban Heat Islands, reduce smog and
improve energy efficiency. Building and energy codes in many parts of the
country have or are being revised to include both reflectance and insulation
requirements.
The dramatic reduction in surface temperatures that light-colored roof
coatings provide, can substantially improve the energy efficiency of a
building.
Dramatic Temperature Reductions
RC-2000 can reduce surface temperatures by as much as 100°F. Studies
performed by the Florida Solar Energy Center show that temperature
reductions of this magnitude, dramatically reduce the heat transfer into the
building and can lower the energy required for cooling by up to 40%. Some
estimates put the energy-savings potential of light-colored roofs at $10
billion dollars per year nationally.
Energy Star Charter Member
In February 2000, the EPA announced its Energy Star Roof Products Charter
Partner companies at the National Roofing Contractors Association (NRCA)
convention in Phoenix. Inland Coatings Corporation is a Charter Partner and
is actively developing products with improved energy-saving characteristics.
The Energy Star Program has specifications which all qualified products must
meet or exceed. For Low-Slope Roofs, the performance criteria requires that
the initial solar reflectance (at time of application) be a minimum of 65%,
and a minimum of 50% after three years of weathering.
Ongoing Testing
In August of 2001,
Inland completed the required testing on its RC-2000
White Rubber Roof Coating, which has an initial solar reflectance of
approximately 82%.
All of the coating applications evaluated had been in service for a minimum
of three years, were a bright white color and in excellent condition. The
solar reflectance on the various buildings exceeded 72%. These weathered
results are substantially higher than the Energy Star requirement for new
applications and provide insight into the long-term performance of the
product. It is worth noting that although Inland's weathered test results
were very favorable, they were taken on metal roofing panels, which is an
irregular surface. Although additional testing is required, we believe
these solar reflectance measurements may still be artificially low, due to
the substrate and may not fully reflect the long-term color stability of the
product.
Inland's RC-2000 White was designed to repair the roof and reduce the
facility's cooling demand with the same capital expenditure. It not only
provides a durable, corrosion resistant barrier that reduces thermal shock
and UV degradation, it can dramatically reduce roof temperatures and cooling
related energy bills.
New Colors
Inland is currently developing a variety of pastel colors which will meet
the initial Energy Star requirement of 65% solar Reflectance. Although
these products will
be available in the near future, it will take a minimum of three years for
them to be qualified under the program. Nevertheless, we feel they will
provide excellent weathering and energy-saving benefits.
Competitive Comparison/Results
Although initial solar reflectance measurements provide a starting point
when evaluating the energy saving properties of a coating, the weathered
measurements that are taken after years of exposure provide significant
evidence relating to its long-term performance. If the solar reflectance of
a new application is rapidly diminished by discoloration and excessive
deterioration, the temperature reductions and energy savings associated with
the product will also decline sharply. Additionally, the products ability
to resist excessive dirt accumulation
is an important consideration, as this can be a primary cause of reduced
solar reflectance.
The picture below illustrates the long-term performance of Inland's RC-2000
Rubber Roof Coating and provides a side-by-side comparison
of it and a competitive coating. Please note that the RC-2000 is on the
left of the structural beam, and the competitors elastomeric latex is on the
right. The Inland RC-2000 is visibly much whiter and has significantly
higher solar reflectance than the competitive product. Thus the RC-2000
will provide significantly higher energy savings and improved durability.
Energy Consumption Reduced By 32%
In early 2001, the roofing project on Public Storage's facility in Memphis,
Tennessee was completed by Memphis based contractor Protective Coatings Inc.
Inland's line of synthetic rubber coatings were selected for this project
and the reflective finish coat was Inland's RC-2000 White Rubber Roof
Coating. In October of 2001, Mr. Ed Harris of Protective Coatings requested
a utility usage printout on this facility, comparing the electric energy
consumption from May to September for the years 2000 and 2001. The results
of the report provided by the Memphis Light, Gas and Water Division, showed
a 32% decrease in energy usage for the year 2001. This represents a very
significant reduction in operating expenses for this facility, and Mr.
Harris estimates that the project will virtually pay for itself in less than
three years.
|