Hoʻokumu ʻia ka pā hale polyurethane me 2 mau ʻāpana o nā ʻili kila kala a hoʻokuʻu ʻia i nā ʻano paʻakikī o ka polyurethane ma waena o 2 papa e hōʻike ana i nā mea ahi.Ua māhele ʻia i ʻelua mau ʻano: ʻO nā nalu ʻekolu o polyurethane composite roof panel, ʻO nā nalu ʻehā o polyurethane composite roof panel.ʻO nā hiʻohiʻona o ka PU roof panel he wela wela, waiʻole, kani kani, a maʻalahi hoʻi e hoʻokomo.ʻO ka hana maikaʻi ke kumu i koho ai ka poʻe he nui ia e like me ka papa luna.