A roller stop (50) for a sectional door (D) having a plurality of hinged panels 20, rollers (30) attached to the panels, and a pair of tracks (T, T′) receiving the rollers for guiding the sectional door between a closed vertical position and an open horizontal position, the roller stop having a body portion (27), and at least one clamping member 67, 68 associated with the body portion adapted to engage one of the tracks, wherein the body portion is adapted to contact at least one of the rollers to temporarily maintain the sectional door in a predetermined position.