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What kind of treated timber lasts hundreds of years? When I think of treated timber I’m thinking of Bunnings treated pine... what is the industry standard timbe

• dmitriy_ko 5y ago
  Parent poster meant "properly cared for timber", not chemically-treated timber. Timber doesn't have an expiration date. As long as you keep it dry, it will last indefinitely. In fact, it becomes stronger over time. There are many 100+ years timber buildings in US. For timber used outdoors, e.g. for making decks pressure-treated timber is used. It's a timber treated with pesticide (chromated copper arsenate). In the past creosote was used to treat things like wooden railroad ties and power poles, but it's no longer used because it's toxic.
• joeman1000 5y ago
  If timber is properly seasoned with appropriate treatments depending on region it can actually last hundreds of years. We have redgum timber at home which was used some time in the late 1800s.