1. There is welding point for before welding, but no point for after welding
2. The corrosion resistance of galvanized fence after welding is better and won't easily rust
3. Price of after welding is higher
1. There is welding point for before welding, but no point for after welding
2. The corrosion resistance of galvanized fence after welding is better and won't easily rust
3. Price of after welding is higher