The ornamental design for a roofcap, as shown and described.
FIG. 1 is a front-side perspective view, taken from the left end, of a roof cap embodying the present invention;
FIG. 2 is a front-side perspective view taken from the right end of the roof cap;
FIG. 3 is a right side view of the roof cap;
FIG. 4 is a bottom view of the roof cap;
FIG. 5 is a top view of the roof cap;
FIG. 6 is a front view of the roof cap; and,
FIG. 7 is a rear view of the roof cap.
The portions of the roof cap shown in broken lines are for illustrative purposes only and form no part of the claimed design. The left-side view that is opposite FIG. 3 is a mirror image and is not shown.