This 2,500-word guide analyzes seven critical indicators of floor wear through macro photography and cross-sectional diagrams. Learn how to differentiate between surface-level scratches (repairable with screening) and deep fiber damage (requiring full sanding). We include a proprietary “Wear Index” scoring system used by our craftsmen, case studies of 15-year-old floors in high-traffic homes, and cost comparisons between DIY vs professional refinishing in 6 global markets.