We all know how replacing the flooring material in a room can change its appearance, creating a unified new surface for furnishings. If that’s in your plans, spend some time deciding how the new surface will transition to the level of flooring in the hallway or adjoining room. If you’re in a newer home with a smooth subfloor or level floor surface, you can use a standard T-molding threshold. But the situation requires more thought when you have uneven floor surfaces due to previous remodeling. This is often an issue in an older house that may have had several layers of flooring installed, one on top of each other, which raises the floor level in one room and not the adjoining rooms or spaces….