The small shed that we built for this allotment features a special construction technique: its outer shell is made of textile concrete, a material normally used in landscape design or road construction. Here it acts as a 5-mm-thick skin, protecting the underlying wood structure against the weather.
Design-wise, the advantage is clear: this textile concrete comes in rolls and you can apply it freely, almost like throwing a soft costume over your building. It hardens only once you add water.