the application of hot bitumen, with a roofers hand mop or mechanical applicator, to the substrate or to the felts of a bituminous membrane Solid Mopping: a continuous mopping of a surface Spot Mopping: a mopping pattern in which hot bitumen is applied in roughly circular areas, leaving a grid of unmopped, perpendicular bands on the roof Sprinkle Mopping: a random mopping pattern in which heated bitumen beads are strewn onto the substrate with a brush or mop Strip Mopping: a mopping pattern in which hot bitumen is applied in parallel bands
the application of hot bitumen with a mop or mechanical applicator to the substrate or to the felts of a built up roof