Because the DOFF System is a steam based cleaning method, there is no need to use a chemical biocide during the course of the treatment. This makes the DOFF System environmentally friendly and well suited for use on heritage buildings.
Having the ability to increase the temperature of the steam, means that the DOFF System can make short work of removing different types of paint and biological matter such as algae and moss. The temperature at the nozzle end of the DOFF System can reach up to 150°C. When removing paint, we apply our specialist, water-based, paint softener 24 hours before the start of the cleaning programme. We are able to remove most indoor and outdoor paints and lacquers.
The DOFF System is incredibly versatile and can be used to safely clean a multitude of masonry types, including natural stone and bricks. Using high temperature steam and applying low pressure to the surface being cleaned, means that the surface will be dry in a matter of minutes, avoiding saturation of the brick or stone.
The DOFF system can be used to remove:
- Paint coatings
- Certain types of graffiti
- Bird or vermin fouling
- Algae, moss, fungi
- Other biological matter
- Wax coatings
- Graffiti Removal
- Paint Removal
Graffiti is a blight on commercial and domestic properties alike; at its worst it can seriously affect the reputation and livability of an area. Our steam-based graffiti removal solution (detailed below) strips away spray paint and ink while leaving the original brick or stone surface intact.
What is the DOFF System?
DOFF is a steam-based graffiti removal cleaning system for stone and brick. It’s unlike any other steam system and can achieve temperatures of 150°C (300°F) at the nozzle end. The operator is able to vary the temperature and pressure to remove either many types of paint or biological matter. Slime & Grime are approved operators of the DOFF system.
What can DOFF be used for?
The steam/superheated water will remove biological matter such as moss, weeds, fungi and algae, and will also kill off spores. As the system uses only water, there is no chemical runoff, odour or other environmental concerns; the process is as eco-friendly as you could want. Due to the low pressure and water usage, the system will not cause damage to substrates and hard floors such as stone, brick and concrete driveways.
How does it work?
DOFF cleans stonework and masonry using superheated steam. When the temperature in the system is high, the pressure on the surface being cleaned is very gentle and the volume of water is low – around three or four litres per minute, as opposed to around 35 litres per minute with a pressure washer. The surface is therefore not saturated and will be dry within minutes.
Slime & Grime remove all types of graffiti using a large range of products and methods. Our super heated water systems can remove 90% of graffiti without the use of chemicals, from simple tags to large murals. However, it is sometimes more cost effective to use products and pressure washers where new or small amounts of graffiti exist.