This, combined with fast-grown timber, meant some posts started to fail in less than five years. Problems soon started to creep in, as these were less effective and some of the methods used to apply them weren’t rigorous enough to provide adequate protection. However, concerns over its safety meant it was removed from the market and it was replaced by a different set of formulations. Up until 2006, copper chrome arsenate (CCA) was one of the most common treatments and this did a decent job of keeping the rot at bay. This is actually a brand name for wood treated with one of the more popular products, Tanalith E, so it’s a bit like calling your grainstore vacuum a Hoover. There is a broad range of preservative-treated timber on sale in the UK but, regardless of the process they’ve gone through, they often get referred to as tanalised. They reckon they’ve cracked the problem, with timber and treatments that will stand the test of time, plus they’re willing to issue guarantees to back them up.īelow, we’ve picked out a couple of options that promise a longer lifespan and priced them up against creosote, metal and plastic alternatives.Īll of the products featured are protected by manufacturer warranties of at least 15 years and, with some guaranteeing 30 years or more of service life, buyers better find a safe place to stash their receipt. Some manufacturers have been working hard to shake this reputation, though. See also: How to build the perfect livestock fence Preservative-treated timber fence posts have developed a pretty dire reputation over the past decade or so.Ĭountless farmers have shelled out thousands for these products, gone to the expense of putting them into a fence and then found, five years down the line, that they’ve rotted off at ground level.Īs a result, many have lost faith in posts treated with modern preservatives, turning back to time-proven, pressure-treated creosote, or adopting metal or recycled plastic versions.
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