Term Description
Core cut (core sample)

(1) A sample from a low-slope roof system taken for the purpose of obtaining primarily qualitative information about its construction. Typically, core cut analysis can verify or reveal the type of membrane surfacing; type of membrane; approximate number of plies; type, thickness and condition of the insulation (if any); an type of deck used as a substrate for the roof system; (2) for spray polyurethane foam-based roof systems, core cuts are used to obtain quantitative and qualitative information, such as thickness of the foam; thickness and adhesion of the coating; thickness of individual passes; and adhesion between passes and the adhesion of the foam to its substrate.