DOFF cleaning is a highly effective method of steam-based cleaning used to remove unwanted substances from surfaces. It involves using high-temperature steam under controlled pressure to gently and thoroughly clean building materials like stone, brick, concrete, and metals. DOFF cleaning is particularly suitable for delicate surfaces where other methods might be too abrasive.

DOFF cleaning works by projecting a superheated water steam onto the surface to be cleaned at temperatures up to 150°C (302°F). The controlled pressure and high temperature of the steam effectively break down and remove contaminants such as dirt, moss, algae, graffiti, and paint without causing damage to the underlying substrate. The steam is then applied and carefully adjusted to ensure optimum cleaning results.

DOFF cleaning offers several advantages over traditional cleaning methods:
- Gentle yet powerful: The high-temperature steam effectively removes dirt and grime without the need for harsh chemicals or abrasive techniques.
- Versatile: Suitable for a wide range of surfaces including historic buildings, monuments, and delicate stonework.
- Environmentally friendly: Utilises only water and steam, making it an eco-friendly cleaning option.
- Efficient: Provides deep cleaning and restoration with minimal impact on the surrounding environment.

DOFF cleaning is suitable for a variety of surfaces, including:
- Natural stone (e.g., sandstone, limestone, granite)
- Brickwork
- Concrete
- Terracotta
- Metals
- Wood
- Rendered facades

Yes, DOFF cleaning is considered safe for use on historic or delicate buildings when carried out by trained professionals. The method's gentle yet effective approach ensures that the underlying structure is not damaged during the cleaning process. DOFF cleaning can help restore the appearance of historic buildings without causing any harm to the original materials. These FAQs provide a basic understanding of DOFF cleaning, its benefits, and suitability for various surfaces. For specific inquiries or to learn more about how DOFF cleaning can benefit your property, consult with a professional cleaning service experienced in this method.