Kashiwagi, D., Gajjar, D., Kashiwagi, J., & Sullivan, K. (2016). Hail Study on a 15 Year Old Sprayed Polyurethane Foam Roofing System. Journal for the Advancement of Performance Information and Value, 8(1), 5–1 . https://doi.org/10.37265/japiv.v8i1.47