15th September 2025 Can MDF Skirting Boards Bend Around Curved Walls? MDF skirting can bend slightly, but not as tightly as polyurethane. Recommended minimum bending radii: 12mm MDF – 500mm radius 15mm MDF – 800mm radius 18mm MDF – 1800mm radius For curves tighter than these, polyurethane skirting is the better choice.