Some are, but most are galvanized (zinc coated) steel. Stronger and less expensive.
2nd answer:
There are also corrugated fiberglas panels that are popular for patio roofs.
Corrugated roofing is made of either metal or plastic and is one of the cheapest roofing options on the market. This type of roofing lasts a very long time and is easy to repaint and maintain. The corrugated panels are flexible, making them easy to work with and damage-resistant. They are a great option for a garden shed or storage area that needs cheap, durable roofing. You can often install them yourself, cutting your costs down even more.
Metal Roofing is available in many different metals. You can purchase metal panels that are made from aluminum, copper, zinc, steel and more. The most common and economical roofing panels today are made from steel, usually coated with a protective substrate like Galvalume.
It depends on where in Africa you are referring to. Africa is a whole continent so you will need to specify what country and area in that country you are asking about. However generally roofs are made of either aluminum or clay roofing. Roofs used to be made out of zinc but most switched to aluminum. The clay roofing is similar to roofing in hot regions in the United States such as California.
Shutters can be made from materials such as wood, plastic or aluminum.
Favelas are made from any available materials, such as corrugated iron sheets, plastic, wood and even cardboard.
Metal Roofing is most commonly made from steel, though it can also be made from copper, aluminum or zinc. Steel metal roofing panels are usually coated in substrate known as Galvalume (which is a mixture of zinc and aluminum), they are then primed and coated with a high-quality paint (SMP or PVDF usually) which is baked on. Some unpainted metal roofing panels are simply galvanized or coated with galvalume and then coated with an acrylic finish.
Election signs are typically made out of durable materials such as corrugated plastic or vinyl. These materials are weather-resistant and can withstand outdoor conditions for an extended period of time. Additionally, election signs may also be made of cardboard, paper, or other lightweight materials for temporary or indoor use.
Aluminum
titanium and aluminum
To shingle a roof, you need the shingles which can be made of a variety of materials, the most common being asphalt. You then need a hammer and roofing nails, which are specially made for roofing.
There are many materials that can be used to make an outdoor sign. Which ones you choose will vary depending on the purpose of the sign. Banner material may work for more temporary signs, while more permanent signs are best made out of corrugated plastic or aluminum.
There are many different materials that a car rim can be made of. Some of these materials are chrome, aluminum, steel or plastic. Aluminum is the most popular material for car rims to be made of.