Abstract: A bituminous sheet or web coating material (1) is on the one side provided with a heat activatable adhesive layer (3) optionally covered by a plastic film (5), wherein the adhesive layer is provided with a pattern of close grooves (4) with intermediate unbroken ridges, and a process for forming a coating on a support is performed by heating such coating material (1) to decomposition of said plastic film (5) and activation of the adhesive layer (3), the activated adhesive layer (3) being pressed against the support, e.g. a roof.

Abstract: An apparatus serves for applying web shaped material to a substrate. The apparatus includes a frame structure having bearings for mounting a roll of the material. The frame structure supports guides for the web. A mount together with the guides are arranged in such a way that a part of the web being applied is accessible for heating by a burner arrangement. In order to obtain a secure controlling of the roll during application of the web shaped material, the guides for the web are arranged upon the frame structure in such a way that the web is moved from the roll in an upward direction, around the guides and downward around part of the outer circumference of the roll between the roll and the substrate.