The visionaries behind the product.

Fred Harkness

  • President

Fred has been a builder for over 35 years as owner and operator of Harkness Built construction and design firm. Through many years of residential innovation, design, and construction, it became apparent to Fred that there was a definite need to improve and integrate roofing and energy technology. This became his ambition, and after several designs, prototypes, and tests, Fred installed the pilot system on a residential garage. With a year of initial testing in hand and positive efficiency results from preliminary tests from the Florida Solar Energy Center, Fred went on to develop INroof into the business it is today. With a patent pending and ICC-SRCC™ OG-100 certification in hand, Fred looks forward to bringing energy efficient and design-compatible roofing to consumers.

Caleb Reninger

  • Production Manager

Caleb was a test engineer with the Florida Solar Energy Center for over 10 years, specializing in solar thermal collector testing. Caleb’s experience has given him invaluable knowledge of solar thermal products currently on the market as well as a broad understanding of the solar industry as a whole.

Jessica Mulcahy

  • Chief Operating Officer

Jessica has been with INroof since its infancy. With a history of grant writing experience, she came onboard as a researcher and writer. In addition to developing company literature, she also manages INroof social media account, is the design and marketing liaison, and continues expanding her role with the company’s development.

John Del Mar, P.E.

  • Engineer

John was a Senior Research Engineer, Program Director, and Technical Manager at the Florida Solar Energy Center’s thermal test lab from 2008 through 2015. During his tenure, the FSEC test laboratory was one of only a few labs worldwide that were ISO 17025 accredited to provide the solar thermal tests required for SRCC certification. John oversaw testing and analysis of solar thermal and solar PV products from many prominent worldwide manufacturers. John established a working relationship with INroof while at FSEC and has provided technical consulting since leaving the FSEC in the Fall of 2015.