Abstract: A strip of pressure sensitive tape is laid out along top and bottom plates or top and bottom tracks of a wall that is to be constructed with studs at a fixed spacing. The tape bears stud location marks at preselected intervals for ease in locating the studs for connection to the top and bottom plates and top and bottom tracks. The tape is provided in a supply roll that is rotatably mounted in an applicator tool having a handle and a pressure roller that enable the tape to be pressed against the plate or track and withdrawn from the roll as the tool and tape are moved along. To facilitate locating and positioning of the end of the tape, and therefore of the first stud location mark of the tape, the tool is provided with a pressure foot extending from the pressure roller and has an edge which may easily be positioned at the desired starting point of the tape, as, for example, against an existing wall.