How Long Do uPVC Sliding Windows Really Last?
In the world of home improvement, uPVC windows are like that one friend who refuses to age. While wooden windows eventually warp under the sun and aluminium can get "pitted" or corroded in salty air, uPVC stays... uPVC. But "lasting a long time" is a bit vague. If you are investing in 2026, you want numbers. On average, a high-quality uPVC sliding window will last between 20 and 35 years. However, the frame itself is essentially the "cockroach of building materials"—it can theoretically last much longer if you take care of the moving parts. Here is the breakdown of why these windows are so incredibly resilient. 1. The "U" is the Secret Sauce uPVC stands for Unplasticized Polyvinyl Chloride. In regular PVC (like a garden hose), plasticizers are added to make it flexible. In windows, they are removed to make it rigid and rock-hard. Chemical Stability: Because it's unplasticized, it won't become brittle or "crack" like cheaper pl...