The Cost Effectiveness of Alpha SPF Roofs: Casa View Elementary School Roofing Case Study

Authors

  • Dean Kashiwagi, PhD, PE Arizona State University, United States
  • Charles J. Zulanas IV, M.S. Arizona State University, United States
  • Dhaval Gajjar, PhD Arizona State University, United States

DOI:

https://doi.org/10.37265/japiv.v8i2.63

Keywords:

Alpha roof system, sprayed polyurethane foam, roofing, sustainability, FM-SH hail testing

Abstract

The performance of the Alpha Sprayed Polyurethane Foam (SPF) roofing system is perceived as not an economical option when compared to a 20-year modified roofing system. The Dallas Independent School District (DISD) is replacing the existing Alpha SPF roof systems with new roof systems rather than recoating the existing systems at a cost that is 100% more than the recoating costs. The DISD is in a heavy hail area, and the proven hail resistance of the Alpha SPF roof system is an additional benefit for DISD who is self-insured. The Casa View Elementary School roof system was installed with a Neogard Permathane roof system in 1987. This roof was hail tested with ten drops from 17 feet 9 inches of 1-3/4-inch steel ball (9 out of 10 passed) and three drops from 17 feet 9 inches with a 3-inch diameter steel ball (1 out of 3 passed). The analysis of the passing and failing core samples show that the thickness of the top and base Alpha SPF coating is one of the major differences in a roof passing or failing the FM-SH hail test. The current potential cost savings of purchasing a 61,000 square feet Alpha SPF roof versus modified bitumen roof is approximately $610,000 for DISD. The past hail tests on Alpha SPF roof systems show high customer satisfaction (9.8 out of 10) and an over 40-year service life after a $6.00/SF recoat.

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Published

2016-10-03

How to Cite

Kashiwagi, D., Zulanas IV, C., & Gajjar, D. (2016). The Cost Effectiveness of Alpha SPF Roofs: Casa View Elementary School Roofing Case Study. Journal for the Advancement of Performance Information and Value, 8(2), 42. https://doi.org/10.37265/japiv.v8i2.63