Abstract
This paper deals with the surface temperature problem of flat roofs, where bitumen sheets are used as the final waterproofing layer. Currently it is possible to find defects due to the high surface temperature of the waterproofing layer on flat roofs. The result of such a high surface temperature is, for example, the release of bitumen sheets and the sublimation of the thermal insulation from foamed polystyrene. The paper focuses on the influence of the type, the color of the sprinkling and the type of background on the surface temperature. The aim of this paper is to determine the surface temperature of bitumen sheets based on the experimental measurement depending on the type and the colour of the surface. Measurements were made during warm summer days. Samples of bitumen sheets with green, grey, blue-grey, red, white and black-grey sprinkling were used. Concrete and foamed polystyrene were used as a background under bitumen sheets.
Highlights
This paper deals with the surface temperature problem of flat roofs, where bitumen sheets are used as the final waterproofing layer
This paper focuses on the surface temperature of waterproofing of bitumen sheets in flat roof compositions with a classical order of layers without the influence of sunlight reflection
In the composition of the classical order of layers, where the waterproofing is above the thermal insulation layer, bitumen sheets are directly exposed to sunlight
Summary
This paper focuses on the surface temperature of waterproofing of bitumen sheets in flat roof compositions with a classical order of layers without the influence of sunlight reflection. In the composition of the classical order of layers, where the waterproofing is above the thermal insulation layer, bitumen sheets are directly exposed to sunlight. High surface temperature is one of the causes of faults on flat roofs with a waterproofing coating. These failures are manifested, for example, by the release of joints and the sublimation of the thermal insulation from foamed polystyrene. Bitumen sheets with polyester support are shrinking This shrinkage occurred due to the pre-stressing that was introduced into the liner during the manufacturing process. The topic of the surface temperature was analysed by authors for example [1], [2] on the European level, for example [3]
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