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This material is quite resilient and strong. This is the reason why this material is used in tilt and turn walls and upvc sliding sash walls. Though wood is tough, it needs to be protected and weather-proofed. If it isn't protected, it will eventually rot and change in shape, whereas aluminum may oxidize and rust. This will not happen to uPVC and it can  " Swimming pools interlocking exterior wpc wall panels , how much does a screened in deck cost "withstand some of the toughest weather conditions known to man. Many companies will even offer longer guarantees. Cleaning and Maintenance When anyone purchases any product, one thing that many consider is the time and effort that is needed for cleaning and maintenance. A product or material may offer a lot of benefits, but if it needs spending several hours cleaning or maintaining it, then it makes it less attractive when considering a purchase. UPVC will not cause long hours to be spent having to clean it. Maintenance is fairly low. When looking at wood in comparison, it needs to be repainted or re-protected. Wood is not permanent, including the protecting finishes that are added after a structure  " landscape timber driveway edge , how much does it cost to put in a balcony "