A trim assembly may include a starter strip having a first fastener hem configured to receive a fastener, a starter flange extending from the first fastener hem, and a first rib extending from the starter flange. A fastener flange having a second fastener hem may be configured to receive a second fastener. The fastener flange can include a second rib extending from the second fastener hem. A trim having a first slot may be configured to receive the first rib and be mounted to the starter strip, and a second slot configured to receive the second rib and be mounted to the fastener flange.

A system of a skirting board (1) and at least one fixing element (2) for connecting the skirting board (1) with a floor (P) and an adjacent wall (S). the fixing element (2) comprising a rigid part (3) to be fixed immovably to the wall (S) and a resilient assembly (4) engaging the skirting board (1), the skirting board (1) comprising an internal shelf (7) extending towards the fixing element (2). wherein the resilient assembly (4) comprises at least one resilient arm (6) extending parallel to the wall (S) and being adapted to resiliently deflect parallel to the wall (S), said at least one resilient arm (6) projects obliquely from the rigid part (3) towards the floor (P) and has a free ending (6), said shelf (7) comprising a coupling protrusion (8) adapted to be snapped with said fee ending (6) so that said coupling protrusion (8) is pressed by the at least one resilient arm (6) in a direction different from horizontal. in particular in a direction selected from a group comprising the vertical direction and a direction slanting both to the wall (S) and the floor (P).

A modular molding system is provided for mounting at a wall-ceiling interface in a structure, such as an RV, and around a window opening in the structure. The system includes a mounting component and a trim component removable mountable to the mounting component. The mounting component is configured in one embodiment to be mounted to the wall-ceiling interface and in another embodiment to be mounted around a window opening. The molding system includes a functional component separate from the function of the molding system. In one embodiment, the functional component is an LED lighting strip and, in another embodiment, the functional component is a guide channel for a screen or sunshade of a window valence. A snap-fit engagement is provided between the mounting component and the trim component. The mounting component and the trim component are extruded plastic so that that the components can be cut to size as desired.