A ferrocement roof channel is a longitudinal element, semi-cylindrical shaped.  It is easy to construct, uses less cement and steel than a conventional RCC roof and is also cheaper. During the installation process the roof channel is lifted into place and can immediately be joined together in order to provide a shelter, a roof or a floor slab. The following document gives a detailed description of the manufacturing process of the most common and tested roof channel developed by the Auroville Building Centre.