Abstract: An interior wall partition trim assembly for providing a decorative trim molding at the ceiling-wall junction and corners together with a decorative chair rail trim member for trimming walls and corners intermediate the ceiling and floor, the combination of ceiling trim splice members shaped to fit supportingly inside the abutted ends of elongated hollow ceiling trim moldings and chair rail trim splice members shaped to fit inside the abutted ends of hollow chair rail trim members to position the respective abutted ends in even registration when fastened to a ceiling junction and wall, respectively. The splice members and mounting fasteners are accessible for mounting or demounting by pivotable decorative panels on each ceiling and chair rail trim member which close to hide the respective splice members and fasteners. Right angled corner cap junction members have ceiling trim molding insert adapters. Right angled chair rail corner bodies have chair rail trim member insert adapters.

Abstract: An interior wall partition trim assembly for providing a decorative trim at the junction of interior wall partitions with each other or with the ceiling or floor structure, comprising molded vinyl channel shaped cap members for placement along the intersection of a wall with a ceiling, at an inside corner, and an outside corner and the intersection of the walls with the floor surface. Integral molded junction members at the corners between inside and outside wall intersections with the floor and ceiling eliminate the requirement for cutting mitered joints between the trim members. Cap members are releasably secured in position by spaced apart retainer plates which are formed plastic members having a planar web portion and opposed standoff flanges which engage resiliently deflectable flanges of the cap members.