Troughed (Trapezoidal) sheets have an angular profile with robust design. With an aesthetic look, they are a modern alternative to traditional corrugated metal roofing sheets.Troughed (Trapezoidal) sheets are also available pre-painted in a variety of colours.Aluminium Troughed (Trapezoidal) sheets are a perfect choice for roofing and claddings of industrial as well as domestic applications. They are designed as per IS 1254: 1991.