When sourcing garden fencing, the material choice directly impacts the product's lifespan. For metal fencing (steel or aluminum), ensure it features hot-dip galvanization and UV-resistant powder coating to prevent rust and fading. For WPC (Wood Plastic Composite), look for a high HDPE (High-Density Polyethylene) ratio (typically 30-40%) mixed with wood fibers to ensure resistance to rot and termites. If sourcing PVC fencing, verify the inclusion of Titanium Dioxide (TiO2), which acts as a critical sunblock to prevent the vinyl from becoming brittle or yellowing under intense sunlight.