Redwood, cypress, and cedar are termite and rot resistant. These are softwoods and may not last as long as hardwoods.
Redwood and Wolmanized Lumber
Red pine is one of the most used woods in the country. It is not naturally rot resistant, however, it can be protected and treated to ensure that is it can resist rot.
No
The disadvantages of Ash wood is that it is not as rot proof or water resistant as other hard woods. If it is left untreated, it will rot quickly.
Hemlock is not very rot resistant.
Although all wood will rot in due time but pine and oak will last longer
Some types of wood that are known for being water-resistant include teak, cedar, redwood, and mahogany. These woods are naturally resistant to rot and decay due to their high levels of natural oils and tannins.
Titanium is highly corrosion-resistant.
The best types of wood for fascia boards are typically cedar, redwood, and mahogany. These woods are durable, resistant to rot and decay, and can withstand exposure to the elements.
Rot-Resistant WoodsA few years ago, redwood was a big no-no for anyone who cared about the environment because venerable old-growth trees were laying down their lives to become lawn furniture. Today, redwood is a renewable resource, as millions of redwood seedlings are replanted every year-about five for every tree harvested. And cedar is an even better choice since it can be forested even more easily and quickly than redwood. Both native woods are naturally rot-resistant. They are good, reasonable, non-chemical alternatives to pressure-treated wood, but they are not totally care-free, and a deck made from either redwood or cedar will still require regular maintenance. Tropical Wood AlternativesThere are other rot-resistant woods that are just coming to the American market, including ipe (also known as ironwood) and cambara. These exotic woods will last for 2o years or more with just one preservative treatment. Ask to see certification of sustainable harvesting methods before you buy any tropical wood products.* http://www.care2.com/greenliving/hit-the-deck-with-nontoxic-solutions.html
The best types of wood for ground contact applications are pressure-treated woods like cedar, redwood, and tropical hardwoods. These woods are more resistant to rot and decay, making them ideal for outdoor projects that come into contact with the ground.
Lightweight,dimensionally stable and rot resistant