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), pp. 5–1 . doi: 10.37265/japiv.v8i1.47.