This is corrugated roofing sheets, which can be made from various materials. The sheets are often used for roofing and insulation.
Corrugated roofing sheets are a popular choice for roofing due to their durability and ease of installation.
Materials used for these sheets can include metal, such as aluminum, or plastic.
Aluminum foil is also used as a reflective insulation material for roofs to reduce heat transfer and improve energy efficiency.
The corrugated design provides strength and allows for water runoff.