A Study on Changes of Physical Properties of Rooftop Exposed Waterproofing PVC Sheet based on Longterm Outdoor Exposure Testing with Bearings (North, South)

옥상 노출방수용 PVC 방수시트의 방위별(남, 북) 장기옥외폭로에 따른 물성 변화 연구

Exposed type waterproofing PVC sheets installed on structure rooftops are subject to changes in physical properties after longterm exposure to sunlight. Particularly when consideration the rotational movement of sunlight over the day through the course of the sun rising from the east and setting in the west, in the case of flat roofs the amount of UV ray the the surface of the PVC waterproofing sheet receives may be even throughout, but in cases of slanted rooftops the sunlight exposure may be uneven across the surface. In this regard, this study examines the effect uneven sunlight exposure on the exposed type waterproofing PVC sheets installed on slanted rooftops.