A T-molding (often called a “T-bar” or simply a “transition strip”) is a flooring accessory designed to bridge the gap between two floor surfaces of approximately the same height. Commonly used in laminate, hardwood, and vinyl flooring installations, it has a cross-sectional shape like the letter “T.” Here’s how and why it’s used: Transitions Between Rooms or Areas: In open-concept spaces or at doorways, a T-molding neatly covers the joint between two floors of the same level. This provides both a visual boundary and a clean finished look. Hides Expansion Gaps: For floating floors (like laminate or some engineered hardwood), there must be a small gap around the perimeter of the room to allow for natural expansion. A T-molding can hide these gaps and maintain a seamless appearance from one area to the next. Protects the Flooring Edge: By covering the seam where two flooring materials meet, the T-molding protects the exposed edges from chipping or other damage. Accommodates Different Flooring Types: You may have laminate in a hallway and tile in a bathroom. If those two floors are level, a T-molding provides a smooth transition while maintaining a cohesive look. T-moldings are primarily decorative and protective pieces that give a finished appearance to the intersection of two same-height flooring surfaces and help preserve the integrity of the flooring edges.