BITUMEN FELT

摘要

The invention concerns bitumen felt composed of several bitumen layers comprising a support layer (1) and at least two bitumen layers (2, 3.1) applied one on top of the other to a first side of the support layer. On the second side of the support layer (1), a strip (3.2) of a bitumen layer is applied along the longitudinal edge of the felt, the width (b) of the strip being smaller than the width (B) of the felt. The strip is made of the same bitumen material as the outer bitumen layer (3.1) on the first side of the support layer (1). Another bitumen layer (4) which is adjacent to the bitumen strip (3.2) applied along the longitudinal edge is applied to the second side of the support layer (1). This additional layer is composed of a different bitumen material to the bitumen strip (3.2) and extends from the strip to the other longitudinal edge of the felt. This design enables the overlap areas to be particularly well sealed when laying the bitumen felts.