Outdoor wicker furniture’s a very popular choice across Aussie homes, thanks to its lightweight design and the way it fits in with the local decor. However, the problem is that it’s exposed to the harsh Aussie sun and seasonal rainfall, which causes it to deteriorate in a pretty short space of time. That’s why you need to do whatever you can to protect it, not only to extend its lifespan but also to avoid having to shell out big bucks for replacement costs. On top of that, you’ve got to make sure it stays structurally sound in the great outdoors.
The Impact of UV Radiation on Wicker Degradation in Australia
Australia’s got some of the harshest UV levels on the planet. According to the Bureau of Meteorology, the UV Index over long stretches of Queensland, Western Australia and the Northern Territory often soars between 10 and 11+ during the peak summer months. Meanwhile, research done by ARPANSA shows that getting exposed to UV for a prolonged period of time cuts the lifespan of your synthetic wicker in half over just 12 months, even if it’s in a shaded spot. In full sun, the effect is even more dramatic. You can expect to lose about 55 65% of your tensile elasticity over the same period. But that’s not all. The CSIRO has also done some work on this, and it shows that wicker exposed to direct sunlight for 6 hours a day will lose around 30% of its strength over 18 24 months. That’s just for starters, though. Surface temperatures on outdoor furniture in Aussie summers are often over 55C, which only makes the whole thing worse. Compared to the UK, say, the degradation rate is 35 40% faster here, and that’s just because of the way the sun beats down and lingers. As you might expect, this is especially a problem for composite furniture types like outdoor patio wicker sets, which tend to get left out in the open, so to speak. And if you don’t intervene, the effects start to show after just two or three seasons. The wicker starts to look tired and worn out, and it’s a lot harder to fix it than it would be to just replace the whole thing.
Rain and Moisture: Another Stress Point for Outdoor Furniture
The way the rain falls in Australia creates a lot of stress for outdoor furniture. Take a city like Sydney, with its 1,200mm of rain a year, or Brisbane, which gets over 1,100 mm. That’s a lot of getting wet for your wicker. And it’s not just the amount of rain that matters. ABS data shows that in the northern parts of the country, relative humidity can be over 75% for as long as 30 45 days at a time during the wet season. But the worst bit is what happens when the wicker gets wet. CSIRO research shows that untreated wicker fibres can absorb up to 15 18% of their dry weight in water after just two heavy rainfall events. That’s a massive weakening of the structural bonds, and it’s a recipe for disaster. From there, the wicker’s ability to handle stress gradually declines by 35 42% over the next 24 months, while micro cracks start to show up under microscopic analysis. In coastal areas, the risk of fungal colonisation goes up by nearly 50% compared to inland regions. That’s a whole other world of problems.
Material Science: PE Rattan vs Natural Wicker Durability
Material composition makes all the difference when it comes to how well something lasts. The CSIRO ran some accelerated aging tests, and what they found was pretty striking. PE rattan can still hold up to 80 90 percent of its strength after three years of being out in the elements. On the other hand, natural wicker, whether it’s made from rattan or bamboo, basically starts falling apart within 18 24 months when exposed to the same conditions. And when you look at it from another angle, tensile strength, you see the same story playing out. PE rattan comes out on top with an average tensile strength of 20 22 MPa after a long period of exposure, whereas natural fibres can only manage 10 13 MPa. Looking at the market in Australia, it turns out that natural wicker furniture needs to be replaced about every two and a half years, and that can cost anywhere from AUD 300 to AUD 900 per set, with the final price depending on just how complicated the design is. By comparison, the synthetic stuff lasts for 5 8 years, which means you don’t have to replace it as often. But don’t get too excited yet. Synthetic wicker is still not completely immune to the elements. UV light causes the polymers to break down, and that affects the look and flexibility of the material. So, while material selection can make a big difference, it’s not like it can just wave a magic wand and make all your problems go away.
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