Abstract
This paper reports the results of 17-years outdoor exposure test of asphalt thermal insulated exposed membrane roofing. Tensile strength of built-up membrane, tensile strength of desaturated asphalt roofing felt, penetration and softening point of asphalt were evaluated. Tensile strength of built-up asphalt roofing and desaturated asphalt roofing felt didn't show the clear change and trend. The value of softening point increased and the value of penetration decreased with exposure time, respectively. The membrane roofing without silver painting finish presented the larger change. The difference among each layer of asphalt was small.
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