System approach to shingled roofing layout and installation is unlike anything currently available.
The Tape, which uses the TOP of the shingle, is a major improvement from the current practice of roofing layout using the bottom of the shingle. The Tape provides layout without any manual measurements, which facilitates multiple crew installations on the same section of the roof simultaneously, all but eliminates downtime even on the most complicated roof designs, makes dormer navigation easy and greatly reduces the need for supervisory personnel. Two independent chalk line dispensers are connected with a common string line for striking chalk lines on the roof between two tapes. Double Chalker is conveniently equipped with a handle designed into the Chalker body, providing not only an easy grip but also an eight ounce chalk reservoir. Now the roofer goes up on the roof with 16 ounces of chalk and thus does not have to re-chalk the chalker on the roof.