Edinburgh, Fife, Scottish Borders, Perth, Doff Stone & Brick Cleaning – How we do it?
Doff & Jos /Torc stone cleaning / peel away stone cleaning
The DOFF “Superheated water” system is very different action to other “steam” or “hot water” systems currently available on the market and should not be confused with them. It uses “superheated” water which exits the nozzle, in a vortex pattern. The system uses a normal water supply, which then enters a high-pressure pump unit; here the pressure is increased to the required level before entering the “Hotbox”. The pressure can be adjusted by the operator and is independent of temperature settings. With the heater unit, the temperature can be increased up to 150C, before it passes through a heat resistant nozzle. This nozzle directs the super-heated water onto the surface to be cleaned in a scraper like a fan. It is then a case of moving “the scraper” over whatever is being cleaned in an even and methodical manner.
This system can be used to remove organic matter (mosses/lichens/algae’s) from most surface especially stonework and brickwork. The heat of the water also helps to kill the spores of organic matter thus increasing the length of time needed for cleaning. This does not, however, stop all regrowth. To do this then a biocide of some type will be required. Advice can be given on this after contacting us with your requirements. This system is also used to remove paints from stonework and brickwork – in some cases, a paint softener will also need to be applied to the surface to assist in removal. This system is very kind to the substrate that is being cleaned and is therefore liked by listed building officers throughout the country. To see the difference between a normal pressure washer and the Doff System please look at the photo below.
3 Stages Paint Removal and Stone Restoration
Using Softner Non-Chemical