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Thomann-Hanry® provides interior and exterior building cleaning services to clients in Europe and North America. Bernard Thomann, with thirty years of experience in the field of masonry preservation, has continued the direction of this family-run company which was founded in 1946. Headquartered in Paris, this French company has branch offices in Amsterdam, Brussels, Geneva, Lisbon, Luxembourg, Madrid, Milan, and most recently, New York City (USA), and Montreal (Canada). The firm also has a factory in Uzes, France where most of its specialized building cleaning equipment is designed and manufactured.
Although Thomann-Hanry® employs specialists in stone replacement, re-pointing, consolidation, and waterproofing, the firm is most noted for its application of an exterior building cleaning method called Gommage®. It was first developed by founder Robert Thomann in 1965 and has been perfected over the years, receiving a new patent in 1985. This dry process which cleans only with low pressure compressed air and an organic or mineral powder has established a long track record cleaning historic structures in France. Powders used in this process are exclusively manufactured for Thomann-Hanry® in France and are exported for use on foreign projects.
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