A treated pine deck lasts 15 to 20 years with regular maintenance (resealing every 2 to 3 years). Hardwood decks – Balau, Garapa, and Massaranduba – last 25 to 30 years with periodic oiling. Cape Town’s coastal climate demands quality timber and proper treatment to maximise lifespan. The substructure quality and installation workmanship are equally important. A well-built hardwood deck can outlast the home it’s attached to.