Thin shell concrete roofs are typically about 1 cm thick and made from a mixture of cement, sand, water and acrylic on a cloth and light wire mesh base. This roof is supported on a four sided pyramid framework of timber. The resultant shape is a hyperbolic parabola.
The construction reduces the use of timber by more than 60% a complete roof for a house can be done within 10 days. It therefore offers a low cost and environmentally friendly alternative to roof construction.
Technology for Tomorrow was fortunate to receive training on Thin Shell Concrete roof project from George Nez, who has done extensive work on thin shell concrete roof construction and has since completed a few buildings using this technology. It has a potential to lead to savings of up to 45% on the roof structure.