The Doff Cleaning System is a specialised method for cleaning exterior surfaces, particularly in historic and sensitive environments. Here are some reasons why it is used:
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Gentle Cleaning: The Doff system uses superheated water at low pressure, which allows it to clean surfaces effectively without causing damage. This is crucial for maintaining the integrity of delicate materials like stone, brick, and historical facades.
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Versatility: It can be used on a wide range of surfaces, including masonry, stone, tiles, and metals. This makes it suitable for various applications, from buildings and monuments to statues and sculptures.
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Effective Removal of Contaminants: The Doff system is particularly effective at removing biological matter such as moss, algae, and fungi, as well as grime, graffiti, and paint. The high temperature of the water helps to kill spores and prevent regrowth.
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Environmentally Friendly: It uses water and heat rather than harsh chemicals, making it an environmentally friendly option. This reduces the risk of harmful residues affecting the surrounding environment.
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Preservation of Historical Sites: For historical and heritage sites, preserving the original material is crucial. The Doff system's gentle cleaning process helps to ensure that the underlying materials are not eroded or damaged during cleaning.
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Compliance with Regulations: Many historic buildings are subject to strict regulations regarding maintenance and cleaning. The Doff system is often recommended and approved for use on such structures due to its non-abrasive nature.
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Efficiency: The system can quickly and efficiently clean large areas, making it a cost-effective option for extensive projects. The use of superheated water also speeds up the cleaning process compared to traditional methods.
Overall, the Doff Cleaning System is favoured for its ability to clean effectively while preserving the integrity and appearance of delicate and historically significant surfaces.