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Abstract
Since the first distillation of crude oil at the beginning of the 20th Century, bitumen has been the characteristic material for the construction of flat roofs in Germany. This material has been used firstly in the form of hot bitumen as a binder and sealer connecting the individual layers of the roofing to each other and to the base, and secondly in combination with a wide variety of reinforcing plies to form bituminous roofingl. Two main types of flat-roof structure have been developed over the years: the insulated single skin non-ventilated flat roof; and the insulated double skin ventilated flat roof. The individual layers of the roof structure are bonded face to face with hot bitumen and so sealed. In the case of the single skin flat roof, the face bonding with hot bitumen produces a rigid layered panel which suffers from stress and displacement problems, leading to crack formation & consequent leaking. In the double skin flat roof, damage from moisture penetration may occur through inadequate ventilation. As a result, this system is gradually losing ground to the single skin system. Plastic coverings, first introduced over 20 years ago, together with the loose laying technique developed about 6 years ago, have pointed the way to a solution of the problems of the bituminous roofing system.
Since the first distillation of crude oil at the beginning of the 20th Century, bitumen has been the characteristic material for the construction of flat roofs in Germany. This material has been used firstly in the form of hot bitumen as a binder and sealer connecting the individual layers of the roofing to each other and to the base, and secondly in combination with a wide variety of reinforcing plies to form bituminous roofingl. Two main types of flat-roof structure have been developed over the years: the insulated single skin non-ventilated flat roof; and the insulated double skin ventilated flat roof. The individual layers of the roof structure are bonded face to face with hot bitumen and so sealed. In the case of the single skin flat roof, the face bonding with hot bitumen produces a rigid layered panel which suffers from stress and displacement problems, leading to crack formation & consequent leaking. In the double skin flat roof, damage from moisture penetration may occur through inadequate ventilation. As a result, this system is gradually losing ground to the single skin system. Plastic coverings, first introduced over 20 years ago, together with the loose laying technique developed about 6 years ago, have pointed the way to a solution of the problems of the bituminous roofing system.
Date
9/1974
9/1974
Author(s)
Hechler, H
Hechler, H
Page(s)
Paper 2
Paper 2
Source
Society of Chemical Industry
Society of Chemical Industry
Keyword(s)
flat roof; Germany; single skin non ventilated; double skin; ventilated flat roof
flat roof; Germany; single skin non ventilated; double skin; ventilated flat roof