Piano development on Berlin's Potsdamer Platz). Pierced by rows of identical windows repeated across the entire development, the façades are expected to be effectively self-cleaning and immune to fading. The colours of the façades are evoked in the design of many of the development's interior fittings, such as lift-door reveals, handrails and lift displays. The tiles were produced in Germany by NBK of Emmerich am Rhein and mounted on prefabricated façade units in Wrocław, Poland, by Schneider Fassadenbau. The development has been designed with a number of features intended to reduce its environmental impact. It has received an "excellent" BREEAM rating on the basis of features that include 80% of the heating and hot water being provided by biomass boilers, while all of the water discharged from the cooling tower is collected for re-use in irrigation systems and the buildings' flushing toilets. Planted roof terraces laid out by the landscape designer Charles Funke are intended to absorb rainfall, thus reducing runoff, and contribute to biodiversity in the area. Only ten car parking spaces are available, at a cost of £100,000 each, due to the insistence of Camden council that the development should be largely car-free. Piano has commented that he sought to "create a development that brings heart and soul into a forgotten part of Central London's urban fabric. A place that, by adding levitated, articulated and colourful buildings, physically expresses the people-focused and socially responsible credentials of modern corporate tenants." He has said that his design was intended to fragment the outline of the building to make it less imposing, and that the ceramic façades were inspired by the appearance of brick walls and the cases of guitars and drum kits in music shops in the vicinity. Explaining why he chose to make the building so colourful, he said: "The colour idea came from observing the sudden surprise given by brilliant colours in that part of the city. Cities should not be boring or repetitive. One of the reasons cities are so beautiful and a great idea, is that they are full of surprises, the idea of colour represents a joyful surprise." The decision to provide a publicly accessible central courtyard was made as a conscious repudiation of the closed architecture of the old St Giles Court, which Piano described as "a kind of fortress." He has said that the development's accessibility will make people warm to it: "As