A Brief History...
Aluminum dates back as far as the beginning of the 19th century.Before a process that could easily extract aluminum from different ores, aluminum was hard to come by, therefore making the metal more valuable than gold. Napolean III even made sure that plates made out of aluminum were set out for his most honored guests. When the Hall-Héroult electrolytic process was developed in the mid 1880s, it became much cheaper to extract aluminum from ore. At the end of the 19th century, aluminum was being used as building material across the entire planet; it was even used for the dome of the Chief Secretary's building in Sydney, Australia and the Washington Monument's apex.
Aluminum, also known as aluminium, is probably the most common ladder material in a household setting. This material is conductive, which makes this ladder a poor choice for an electrician or someone who uses electrical equipment. Unlike steel, aluminum doesn't rust, however, it is more likely bend because it isn't as heavyduty as steel. Because it is so light, it is the perfect ladder for anybody. Because Aluminum is lighter than the other materials, it is the prime choice for extension ladders that are longer than 15 feet.
Because ladders made from aluminum are rust-proof and light, they will be more common in areas where a lot of water contact is made. Aluminum ladders will also more likely be found in homes than fiberglass and steel because they are light and cost effective. Since aluminum doesn't rust, which makes it last longer, you don't have to buy as many ladders made of aluminum.