HomeServicesProject HighlightsRenewable Energy

Castle and Gray’s team of construction managers are well informed when it comes to building facilities that operate on energy generated by solar power, alternative fuels, and waste-to-energy sources to minimize their carbon footprint. As a growing need for renewable energy sources for our environment becomes more imperative, Castle and Gray int. Inc has become versatile in our knowledge of renewable energy building applications and technology.


Castle and Gray Int. Inc. has handled numerous jobs in which solar power sources have been utilized for a project. Castle and Grays familiarity with the installation and mechanical functions of many solar powered applications, aid in putting our clients at ease when it comes to their long-term energy efficient investments. Solar power in a brief break down is the conversion of sunlight into electricity. This can be done either directly using Photovoltaic’s (PV*), or indirectly using concentrated solar power (CSP*). In the case of concentrated solar power systems, lenses or mirrors and tracking systems are used to focus a large area of sunlight into a small beam heating a centralized location to create power that can be generated from the high concentration of heat to a designated area. On the other end of solar use, Photovoltaic’s convert light into an electric current using the photoelectric effect.

Solar Photovoltaics -(PV*)

Provide electricity

  • Homes
  • Businesses
  • Buildings
  • Light gardens and landscapes

Solar Thermal Power - (CSP*)

Provides Heat

  • Heat Water
  • Homes
  • Pools
  • Etc.
  • Etc.


 Castle and Gray Int. Inc. prides its self on its continuous practice to learn more about additional renewable energy applications. Our commitment to staying knowledgeable on energy efficiency has played a key role in several successful power saving installations through out California, such as with the newer fuel cell technology. A fuel cell is an electrochemical energy conversion device, which converts natural gas and propane, (and eventually bio-fuels) to produce electricity and heat. This innovative system allows for the reduction of overall fossil fuel consumption, a lessening of carbon emissions and a decrease in overall utility costs, while still being able to operate 24 hours a day.

  • Fuel cells can generate 8x more energy per year than the same size solar installation.

Green Roof

Castle and Gray Int. Inc.’s dedication to the newest in progressive renewable energy practices combined with years of construction experience makes us a clear leader within the energy efficiency industry. With Castle and Gray’s extensive knowledge of building with GREEN energy, we know that not all applications are a function of technology and that many renewable energy upgrades can be applied with what Mother Nature has given us. One such application is the installation of a GREEN roof or roof top garden. Roof top gardens provide temperature control to buildings in their resistance to thermal radiation, which reduces energy consumption. GREEN roofing also has the added advantages of hydrological benefits, architectural enhancement, recreational opportunities, and a reduction of rain run-off.

  • A layer of planting on a roof-top can shield off as much as 87% of solar radiation while a bare roof receives 100% direct exposure.

Call Us: 310.457.1665

We most likely service your area:

  • San Fernando Valley
  • North Hills
  • Hollywood
  • Canoga Park
  • Studio City
  • Northridge
  • Sylmar
  • Van Nuys
  • Woodland Hills
  • Chatsworth
  • Burbank
  • Glendale
  • Pasadena
  • Arcadia
  • Ventura County
  • Los Angeles County
  • Orange County


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