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Global Cleaning 2014

INFO | thrive. The growth also caused cracks as root systems penetrated Nymphenburg Palace and Park the stone, resulting in chunks breaking off. The jewel in the magical setting of the park of Nymphenburg Palace, the Grand Cascade is one of most frequently visited landmarks under Important factors: collision pressure, soaking action the curatorship of the Bavarian Palace Department in Munich. and temperature The fountain was designed by Joseph Effner and forms an integral Coaxing the deeply encrusted dirt out of the nooks and crannies component of the baroque palace park that was designed by French required quite a bit of pressure and lots of water in order to achieve landscape architect Dominique Girard and built from 1715 bis 1726. the necessary impact force. At the same time, getting the soaking In the beginning of the 19th century, Friedrich Ludwig von Sckell just right was just as important to effectively loosen the dirt and took it upon itself to refresh the park with a breath of modernism. grime, and flush it all out. He had it redone in a landscape garden while retaining key elements of the baroque garden, such as the center axis elements and the cen- Temperature came into play as a major factor in the second phase. ter canal with its amazing cascade. Here, the surfaces were steam cleaned, i.e. the quantity of water was reduced by half but the heaters were set to full power. The The Nymphenburg Palace park is an outstanding testament to the transformation of a baroque garden into a landscaped garden to the system then reaches a temperature of 145°C with the heaters at highest artistic standards. It is also a proud testament to the unique maximum. Water shoots out of the high-pressure nozzle at a heritage of the Bavarian Palace Department. temperature of approx. 100°C. This way, even the remaining root systems of lichen, mosses and weeds effectively get cooked, preventing regrowth anytime soon. The cascade steps presented a marble was soon again revealed in all its original beauty, acting as different challenge. Besides algae, there were now also clay and a mirror for the water from the fountain, and bringing the Grand calcium deposits in thick and dense layers. Here, too, the surfaces Cascade back to life with its fascinating interplay of colors. had to be systematically worked on with high pressure and lots of water from a distance of about 20 cm. The wide working width of Cleaning according to restoration standards the 40-degree power nozzle was very effective at dislodging the Any description of the Grand Cascade inevitably turns to the layer of dirt from the surface. sculptures that surround this amazing monument to baroque What finally came to light was a multicolored marble surface of red architecture. The central statues, both almost 300 years old, and and gray marble plates set in cream colored tuffaceous rock. These named ‘Danube’ and Isar’ after two major rivers that pass through marble surfaces had been given a protective coating of wax as part Bavaria, needed a major cleaning. Here, too, the hot water high of the regularly scheduled cleaning by the staff of the Bavarian pressure cleaner, deftly handled by a skilled artisan restorer proved Palace Department (they used cold water high pressure cleaners invaluable. Again, getting the mix of temperature, water quantity, to keep any dirt at bay). pressure, spay distance and spray angle just right was of crucial This means a second phase was necessary here, too, complete with importance. a jet of boiling water, which had to be swept over the surface ever It was a process of gradually working your way to a perfect so slowly to get the grit and grime off. It took some work, but the combination – first from a somewhat greater distance and less Tuffaceous rock covered with growth before (left) and after cleaning (right). GLOBAL CLEANING | April 2014   53


Global Cleaning 2014
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