Using end-of-life PVC from pipes, clothing and sheets, a project by London South Bank University has created low-cost roofing called Tectum, which insulates and also collects rainwater. For housing, farms and factories, the roofing is made by cutting pipes into half-moons to resemble the shape of tile roofs. The project was originally created in a competition sponsored by IOM3 and the British Plastics Federation.
