Window and door openings in vertical walls are designed to resist flooding or allowing for easy replacement for new ones. Roofing is copper colour aluminium sheet.

In several reactions a colour change indicates the formation of new products. For example, green copper carbonate reacts, when heated, to form black copper oxide and carbon dioxide gas.

This paper introduces a new chemical colouring technology for copper and its alloy surface to colour a Verde green with respect to technical process, prescription, quality control and so forth.