Abstract: A barrier device includes a horizontal portion formed of a polymer, the horizontal portion having a largest substantially planar surface and a thickness perpendicular to its largest substantially planar surface. The barrier device includes a vertical portion formed of a polymer and coupled with the horizontal portion, the vertical portion forming a substantially ninety-degree angle relative to the horizontal portion, the vertical portion having a largest substantially planar surface and a thickness perpendicular to its largest substantially planar surface. In implementations the thickness of the vertical portion is substantially equal to the thickness of the horizontal portion. A width of the horizontal portion, perpendicular to the vertical portion, is shorter than a height of the vertical portion perpendicular to the horizontal portion—in some cases no more than one third or one fifth its size. In implementations the barrier device may be used to protect an installed baseboard.