Pulpwood. Promotional literature promises lifelong performance for pressure treated wood. Furthermore, it has survived the very wet Norwegian climate. Moisture can't wick up its end grain. Even the outside walls were done in spruce and were never ever painted. In dry climates, cedar raised beds last a long time. In wet climates, the wood rarely has a chance to dry out completely, which can drastically reduce its durability. If you want the wood to last longer you may put a wood preservative on it but it is not at all necessary. Spruce is one of the most important woods for paper uses, as it has long wood fibres which bind together to make strong paper. It's pine. White oak and teak are also long lasting woods that are resistant to decay, twisting, cracking, or warping. Spruce wood, when left outside cannot be expected to last more than 12–18 months depending on the type of climate it is exposed to. Like redwood and cedar, it splits rather easily, so you do … White oak, the "whiskey barrel" wood, differs from red oak in that it is much less porous. And it's not built from a particularly rot-resistant wood. The fibres are thin walled and collapse to thin bands upon drying. Cedar wood projects typically last more than 20 years without splitting, rotting, or warping. It was built in 1327. The Forest Products Laboratory and other research groups have shown that treated wood stakes placed in the ground for more than 40 years remain rot-free. 3) A deck built with pressure treated wood will last a long time. Super-strong, white oak features stainable, straight-grained wood with heartwood that resists decay. The photo to the right is of a wooden chapel, called a Stavkirke, in Oye, Norway. We want your wood to last forever, and yes, you can make wood last forever. 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