An initiative that has begun to incorporate the discourse of sustainability, but is still relatively little used. This is the storage of water from the roof rail, which can be reused for various purposes.

Although it is something simple, has many advantages: it helps to retain water at the peak of rainfall, reducing the burden on the networks and storm water bodies receiver, reduces the pressure on the systems of treated water supply, saving this precious resource; helps keep gardens green in times of drought without major costs, results in reduced water bills at the end of the month.