Thin wear layer: Laminate flooring has a very thin wear layer, usually made of melamine or aluminum oxide. Sanding it down could remove this protective layer entirely, exposing the inner core and making it susceptible to damage from moisture and foot traffic.
Core material: The core of laminate flooring is usually composed of high-density fiberboard (HDF) or particleboard. Sanding may weaken the structural integrity of this core material, leading to warping, buckling, or even crumbling.
Uneven surface: Laminate floors are not designed to be sanded and refinished like solid hardwood floors. Attempting to sand them down may result in an uneven surface, as the thin wear layer might not sand evenly or consistently across the floor.
Voiding warranties: Sanding down the laminate floor will almost certainly void any manufacturer warranties or guarantees, leaving you without any recourse if the floor gets damaged or fails in the future.
If you want the appearance of hardwood floors, the best approach would be to remove the existing laminate flooring and replace it with real hardwood flooring. If cost is a concern, you can explore budget-friendly options for hardwood flooring or consider other types of flooring that mimic the look of hardwood, such as luxury vinyl planks (LVP) or engineered wood flooring. These options are designed to withstand sanding and refinishing when necessary. Always follow manufacturer guidelines and consult with a professional if you're unsure about any flooring project to ensure the best results and preserve the integrity of your floors.