Posts Tagged ‘Reflective Roof’

What Are The Benefits of Reflective Roof Coatings?

December 1, 2009

Benefits of Reflective Roof Coatings / “Cool” Roof Systems

There are those who believe that all black or dark colored surfaces, such as asphalt pavements and exposed black roofing materials, are contributors to a “Heat Island Effect.” Much of the heat generated by absorbing the sun’s ultraviolet radiation is also transferred to the building interior.  In warm temperature areas, this increases the demand for power, as the air-conditioning systems labor to maintain a comfortable working climate.

Studies conducted around the world have long ago established the benefits of a reflective roof coating for a “cool” roof system.  The results are well documented that reflective coatings produce energy savings, a more comfortable work environment and, more importantly, a sustainable roofing solution that can prolong the life of a roofing system with proper maintenance and periodic re-coating,  eliminating the necessity for expensive roof tear-off and replacement–and adding to already overtaxed waste disposal sites.

A major benefit of reflective coatings is their ability to sustain or extend the life of the existing roof, while providing a seamless roof surface that requires no fasteners, adhesives or heat welding.  Environmentally friendly and applicator safe to use, the coating, applied at the proper thickness to a sound roof surface, may virtually eliminate the need to replace existing roof material.  The benefits of acrylic roof coatings produce cost savings for roof maintenance and energy expenses and results in significant environmental benefits as well.

We hope you will consider United Roofing & Remodeling for your next project-and see what 20 years of experience and dedication have to offer. 

Contact us for a Free Quote and a free roof inspection at 612-617-1717.
Or you can email us at:  info@unitedroofingmn.com

In selecting your new roof, it is important to understand your climate zone and the actual energy your home or building will save.  There are two “cool roof” calculators available online that can give good estimates of how much energy you will save.  You can find them at:

DOE Cool Roof Calculator
http://www.ornl.gov/sci/roofs%2Bwalls/facts/CoolCalcEnergy.htm
EPA Cool Roof Calculator

http://www.roofcalc.com/RoofCalcBuildingInput.aspx

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What Is A “Cool Roof” Anyway?

November 26, 2009

What’s So Cool About A Cool Roof?

A cool roof is one that reflects the sun’s heat and emits absorbed radiation back into the atmosphere.  The roof literally stays cooler and reduces the amount of heat transferred to the building below, keeping the building a cooler and more constant temperature.  Imagine wearing a white or a black T-shirt on a hot day.  By wearing the white T-shirt you will remain cooler than if you wore a black T-shirt because it reflects more sunlight and absorbs less heat.  A cool roof is like a white T-shirt, they keep the internal temperature of the building cooler.

However, a cool roof need not be white.  There are many “cool color” products which use darker-colored pigments that are highly reflective in the near infrared (non-visible) portion of the solar spectrum.  With “cool color” technologies there are roofs that come in a wide variety of colors and still maintain a high solar reflectance.

The two basic characteristics that determine the ‘coolness’ of a roof are:

  • Solar reflectance (SR)
  • Thermal emittance (TE)

Both properties are rated on a scale from 0 to 1, where 1 is the most reflective or emissive.

Cool roof is a term used to describe roofs that reflect light instead of becoming hot.  According to a paper presented by Lawrence Berkeley National Laboratory, if every roof and area of pavement in the 100 largest cities in the world were to switch to a cool roof and more reflective pavement, the reduced heat would offset 44 metric gigatons of greenhouse gases – an amount greater than all the greenhouse gases emitted by all the countries on our planet each year.

United Roofing & Remodeling is the leading commercial roofing contractor for high-performance roofing systems for commercial and industrial properties in the Twin Cities. Our expert sales staff will work closely with you to custom tailor a job to fit your needs.  Whether maintaining a specific budget, acquiring a desired warranty, saving energy or developing a tapered insulation system, we have the solutions and capabilities to solve your commercial roofing problems.

Contact United Roofing & Remodeling for all of your commercial roofing needs at 612-617-1717
Or Request a Quote online