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.
Beaumaris
Beaumaris is an area, and also the previous county town, of Anglesey, Wales, at the eastern entry to the Menai Strait, the tidal waterway dividing Anglesey from the shore of North Wales. At the 2011 census, its population was 1,938. Beaumaris was the port of registration for all vessels in North West Wales, covering every harbour on Anglesey and all the ports from Conwy to Pwllheli. Shipbuilding was a major market in Beaumaris. This was centred on Gallows Point-- a nearby spit of land prolonging into the Menai Strait about a mile west of the town. Gallows Point had actually initially been called "Osmund's Eyre" however was relabelled when the community gallows was erected there-- along with a "Dead House" for the corpses of lawbreakers dispatched in public implementations. Later, danglings were executed at the community gaol as well as the bodies buried in a lime-pit within the curtilage of the gaol. One of the last prisoners to hang at Beaumaris released a curse before he died-- announcing that if he was innocent the 4 faces of the church clock would never show the same time.
