DOFF is a steam based stone cleaning system. It’s unlike any other steam system and can achieve temperatures of up to 150°C at the nozzle end – making it a ‘superheated water system’. The operator is able to vary the temperature and pressure to remove many different types of paint and biological matter.
What can DOFF be used for?
The steam/superheated water will remove moss, algae, fungi and other biological matter and will also kill off spores. This means there’s then no need to use a chemical biocide during the removal process or as a protection against further biological activity.
How does it work?
DOFF cleans stonework and masonry using high temperature steam. Whilst the temperature in the system is high, the pressure on the surface being cleaned is very gentle and the volume of water is low. The surface is therefore not saturated and will be dry within minutes.
The DOFF Recovery System or DRS is a specialist ancillary to the DOFF system for internal cleaning works or for use in areas where water recovery is an issue.
It has a hooded lance which extracts all steam, water and debris is to a specially developed vacuum unit via a heavy duty, high temperature hoses.
Water is pumped out of the unit automatically and debris is collected in a catch tank.
“If you want a medical analogy for the DOFF, it’s like the difference between leeches and penicillin!”
Gary Stapleton, Chairman of the Victoria Cross Trust
Frequently Asked Questions
WHAT DOES IT COST TO RUN?
Minimal fuel and maintenance costs. The DOFF uses a clean water supply to provide its steam cleaning power. We do recommend an annual service for optimum performance.
WHAT DOES THE TRAINING COST?
Free delivery and training for up to 4 operatives is included with each machine purchase. Please contact Stonehealth for additional training costs.
IS THERE A WARRANTY?
Yes, 6 months for parts and labour on new machines (excluding wear and tear and service items).
DO YOU HIRE?
Yes, we do hire systems, but only to our customers who have undergone training and own systems. We do this to protect our professional customer base.