Abstract: A trim securement system, for use on a building having a roof, siding, a rake board between the roof and the siding, and a rake-board J-channel located immediately below the rake board. A receiver molding is mounted between the rake board and roofing tiles. A trim device includes a front trim surface, upper and lower trim surfaces which extend perpendicularly rearward from the front trim surface, and a trim tab which extends perpendicularly upward from the lower trim surface. The trim device is mounted so that the front trim surface covers the rake board, the upper trim surface extends into the receiver molding, and the trim tab extends into the J-channel.