Moldings & Transitions Moldings & Transitions A line of complementing moldings and transition pieces are available for many species and colors. Reducer – used as a transition from wood flooring to other flooring of a different height…like vinyl. Stairnose – used as a transition on stair steps and sunken dens T – Molding – used as a transition between two hard surface floors of equal height…like wood floor and ceramic tile. Variable Threshold – used at sliding glass doors, front door thresholds, or raised hearths. Also used as a transition from wood to carpet. Quarter Round – used to cover the expansion space near a wall. Can also be used with a new or existing base molding.