How long your aluminium windows will last depends on their quality. They should last 20 -30 years at least, but have been known to stay in good condition for up to 45 years. This is considerably longer than uPVC and wooden double glazing.
Midhurst
Midhurst is a market town, parish [3] as well as civil parish in West Sussex, England. It pushes the River Rother 20 miles (32 km) inland from the English Channel, as well as 12 miles (19 kilometres) north of the county town of Chichester. The name Midhurst was first recorded in 1186 as Middeherst, suggesting "Middle wooded hill", or "(area) among the woody hills". It originates from the Old English words midd (adjective) or mid (preposition), meaning "in the middle", plus hyrst, "a woody hill". The Norman St. Ann's Castle dates from concerning 1120, although the structures are all that can currently be seen. The castle, the parish church of St. Mary Magdalene and also St. Denis, together with South Pond, the former fish-pond for the castle, are the only three frameworks left from this very early duration. The parish church is the earliest structure in Midhurst. Simply across the River Rother, in the parish of Easebourne, is the destroy of the Tudor Cowdray House.