When sourcing doors for international markets, material selection is paramount for durability. For high-humidity regions, prioritize WPC (Wood Plastic Composite) or Aluminum Alloy doors due to their superior moisture resistance. For luxury residential projects, Solid Wood (Oak, Walnut, or Teak) is preferred but must be kiln-dried to a moisture content of 8%-12% to prevent warping during cross-border transit. For high-traffic commercial areas, Steel Fire-Rated doors with a galvanized coating are essential to prevent corrosion.