The problem
Old doors stick, drag, and let in everything they should keep out.
Steel frames rust from the inside out. Wooden frames warp and crack in the Highveld heat. Both need constant repainting and adjustment. The door that used to slide now scrapes. The one that used to close flush now lets in rain, wind, dust, and noise. Every year it gets worse, and the cost of patching it keeps adding up. At some point, patching stops making sense and a proper replacement is the only real fix.