Which sheet is most commonly used for roofing because it is both lightweight and corrosion-resistant?
Aluminum sheet
A good roofing sheet must be light so it adds little dead load to the structure, and it must resist weathering without rusting through over years of exposure.
Aluminium has a low density, so an aluminium sheet is very light and easy to handle and fix on a roof, keeping the load on rafters and trusses small.
Aluminium also forms a thin, tough, self-repairing oxide film the moment it meets air, and this layer shields the metal from further attack by rain and moisture, giving natural corrosion resistance.
This combination of light weight and built-in corrosion resistance is why aluminium sheet is the common choice for roofing.
Copper sheet resists corrosion well but is dense, heavy and costly, so it is used for special roofs, not everyday light roofing.
Tinplate is steel with a thin tin coat that rusts quickly once the coating is scratched, and stainless steel, though rust-resistant, is heavier and far more expensive, so neither meets the lightweight-plus-cheap-corrosion-resistance need as well as aluminium.
Hence, the answer is Aluminum sheet.
Similar Questions
Which method is often used to bend a flat bar accurately in a workshop without damaging its surface finish?
Which mallet feature is important for its use in sheet metal work?
- A Bent snip is used for:
- Removing pieces from the edge in shearing operation is known as _____.
- By which operation does the sheet metal get cut straight in length?
Which of the following is not a Sheet metal cutting tool?
Which of the following is a sheet metal forming process?
Which of the following is a common reason for using aluminium sheets?
A bent snip is used for:
Which type of snip is suitable to cut curved surfaces?
Important Questions from Sheet Metal Works
The process of stiffening edge of sheet metal article by folding is called------
A sheet metal worker’s anvil is known as
Which method is often used to bend a flat bar accurately in a workshop without damaging its surface finish?
Which mallet feature is important for its use in sheet metal work?
- A Bent snip is used for:
