To sidestep whether pressure treated lumber is a health hazard , we have found it does not last as long as cedar. It is specifically designed for direct contact with the ground. Depending on the species, cedar may last for about 15-30 years, spruce may last for about 4-7 years, and pine may last for about 5-12 years. Preservative treated wood life: This article gives the life expectancy of treated wood or preservative-treated lumber, lists typical treated wood warranty periods, and provides a list of factors affect the life of treated wood. Although toxic extratives play a dominant role in the natural durability of heartwood, Scheffer and Cowling (1966) discussed other For this reason, the preferred material for food garden applications is the foundation grade redwood or cedar, which is a more expensive, but healthier choice. However, higher-grade redwood is the most durable wood, in addition to being the most resistant to insects and rot. Most homeowners should consider using heavy-duty pressure treated lumber if they decide to stay with wood fence posts. Pressure treated vs. redwood I 've heard that both pressure treated wood and redwood offer the same resistance to termites, bugs, mold, and other things that might destroy the wood. Promotional literature promises lifelong performance for pressure treated wood. considerable variation in the average life of the sapwood among the different species. The most commonly used wood types for fences are cedar, spruce, and pine. But young pressure-treated decks, many less than 10 years old, are being shoveled into landfills. I see that redwood is more expensive but it seems that there are not the same worries of the posion getting airborne during cutting. 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. CON - Lowest life expectancy of 10-15 years and then only if properly maintained; Because of the benefits of pressure treated wood, it is the accepted standard for structural framing, supports, and posts needed for deck construction. Treated wood can last more than 40 years. Pressure-treated lumber is ideal for outdoor construction as it has a long, useful life span and is much less expensive than alternatives. Nota-bly, red and white pine posts that were soaked in creosote solution had an estimated service life exceeding 70 years, and jack pine posts pressure treated with copper naphthenate in heavy solvent have had only one failure in 58 years. In fact, many organic gardeners are concerned about all wood preservatives including those of new pressure treated lumber leaching into the soil. bility of treated wood from tree species important to Canada and the northern United States. Two series of pressure-treated Douglas-fir posts have failed. Treated Wood / Lumber Life Life expectancy, warranty & life factors for treated wood. Redwood and Cedar Estimated average life of sapwood varied from 9 years in sweetgum and lodgepole pine to 25 years in red oak, white oak and redwood. Redwood also needs to be treated … It was also swiss cheesed nicely from carpenter ant … Life of treated wood They cost about 50% more than basic ground-contact wood posts but the additional preservative will likely double the life of your fence if you are like most of us and don’t do all the recommended maintenance. Re: Pressure treated lumber longevity that 25 years depends on where you are and what you call lasting .if you do not take care of the lumber in three years that wood ought to be showing age .oh it maybe there another 10 but will you use it as much when it is ugle/cracked/split and decayed . We moved into a 10 year old home and had to tear out stairs and decking, all pressure treated, all old school arsenic laced, and all rotted. Average life of posts treated with chromated zinc chloride was 20 years; those treated with zinc-meta-arsenite had an average life … Square posts sawed from west coast hemlock have had fewer failures than similar posts of Douglas-fir. The first thing you should know in estimating the life of your fence is the natural life of your wood.
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