Kashiwagi, D., Gajjar, D., Kashiwagi, J. and 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 (Jun. 2016), 5–1 . DOI:https://doi.org/10.37265/japiv.v8i1.47.