Research into the building materials has been in high gear due to high cost of constructions and low variety of versatile materials. Increased flooding in the city of Nairobi during the rainy season has been a major headache to the residents of Nairobi. Nairobi news listed NHC Nairobi West Estate, Imara Daima, South C, Near Clay Works along Thika Road, Nyayo High Rise Estate in Mbagathi and Kileleshwa as the top six flood prone areas in Nairobi (Musambi, 2015). Nairobians during this times have found themselves getting stuck in traffic for hours, their houses flooded with raw sewage and deaths due drowning during these times. These floods are attributed to global warming, increase in land paved with impervious materials, insufficient and clogged drainage system.
Nairobians also on other hand suffer from insufficient water supply, with water rationing by Nairobi Water and Sewerage Company (NWSC) becoming a norm. Leafy suburbs like Karen rely majorly on private bore-hole water. This has caused straining on the amount of ground water available. The condition is worsened by the storm water which flow away without recharging ground water table.
With these two contradicting problems, a drainage material which allows water to seep through would be welcomed into use by both hands.