This European Standard specifies a test method for determining the resistance to shearing of a joint between two adjacent sheets of the same bitumen roofing sheets. This test method shall be used mainly for testing the joints in mechanically fastened or ballasted single layer bitumen roofing. The shearing characteristics of a joint between two widths of bitumen sheets vary considerably depending on the method of jointing (flame or heat welding, hot adhesive e.g. bitumen, cold adhesive etc.) the size of the overlap and the workmanship.