W. L. Vickers Construction, Inc

 

About COOL ROOFS

On typical summer day, a roof
surface can reach temperatures that are
nearly 100°F above the ambient temperature 

 In contrast, a cool roof remains at
or near the ambient temperature due to the
characteristics of its outer layer. There are 
several benefits to keeping a roof’s surface
cooler, including air-conditioning energy
and demand savings, monetary savings,
increased human comfort indoors, and many positive impacts on environmental quality.

Actual benefits of a cool roof 
depend on several factors: building type,
HVAC load and climate. Cool roofs
can significantly reduce summer electrical
energy usage translating into immediate monetary
gains for building owners while promoting the Green initiative to reduce atmospheric
pollutants and greenhouse gases.

 Commercial and industrial buildings  
account for over half of the total
electricity used in California and consume a significant source of electricity during peak periods.

A seamless fluid applied Cool Roof is a cost-effective 
method to save energy and reduce demand usage during peak-periods. In addition, a Cool Roof is an excellent compliment to Solar and HVAC.

 

  FACT: A Cool Roof System effectively addresses the building envelope energy consumption and improves the combined efforts of energy saving systems. Cool Roof Systems are eligible for Federal Tax Rebates.

 

 

Solar Reflectance & Thermal Emittance

Solar reflective "albedo" surfaces are often thought of as being “bright white”. Traditional roofing materials have a low solar reflectance of 5 to 15 percent, which means they absorb 85 to 95 percent of the energy reaching them instead of reflecting the energy back out to the atmosphere. The coolest roof materials have a high solar reflectance of more than 70 percent, absorbing and transferring to the building 30 percent or less of the energy that reaches them. Traditional roofs easily reach temperatures of 165F during clear, sunny conditions.


While solar reflectance is the most important property in determining a material's contribution to urban heat islands, thermal emittance is also a part of the equation. Any surface exposed to radiant energy will get hotter until it gives off as much heat as it receives (thermal equilibrium). A material's thermal emittance determines how much heat it will radiate, or how readily a surface gives up heat. When exposed to sunlight, a surface with high emittance will reach thermal equilibruim at lower temperatures because the high-emittance surface gives off heat more readily.

Seamless Cool Roof... A perfect roofing solution for aging commercial  low slope roofs that extend's the life of the roof, compliments Solar and Lighting Systems and provides energy savings.

 

 

COOL ROOF BENEFITS

  • Save on annual electricity bills by reducing summer air conditioning costs.
  • Save peak electricity demand costs if you have time-of-use metering.
  • Reduce roof maintenance and replacement expenses by extending roof life.
  • Increase indoor comfort in summer by reduction of infrared light.
  • Reduce the "heat island effect", air pollution and smog formation.
  • Reduce roofing waste added to landfills.

Monetary Savings

 Applying a cool roof seamless coating can reduce  peak and daily temperature swing experienced by the roof membrane.

Reduced thermal cycling may extend the life of
the existing roof and result in less roofing waste.
These single benefit can reduce the life cycle
cost of the roof.

Monetary savings can be achieved when installing or replacing air-conditioning equipment. Since less cooling is required with a cool roof, the
air-conditioning equipment can often be
downsized, resulting in lower costs.

Increase in Human Comfort

Cool roofs reduce the heat transfer into a
building. For buildings with no air-conditioning, such as many warehouses,
it can significantly increase the interior 
comfort.

 links:

Cool Roof Rating Council (CRRC)

http://www.coolroofs.org/aboutthecrrc.html

 

 For addition information email:

Walt@wlvickersconstruction.com