Which items are included in trim testing combinations?

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Trim testing combinations focus on the painted millwork that runs along the walls. Baseboards are the primary trim at the bottom of the wall, and “associated trim” includes the related trim pieces that are part of that same wall trim system. These are the surfaces that are typically grouped together for sampling because they represent the trim category and share exposure history. Painted outlets, switches, or plates lie on the wall surface rather than being trim, so they aren’t included in trim testing groups. Ceiling moldings or crown molding and window sashes belong to different categories or testing contexts, so they aren’t the standard trim testing combination in this scenario.