Carbon or Carbon sulphation describes an unsightly black staining on the surface of your brick or stonework, this occurs when atmospheric carbon is deposited into the pores of the building usually carried by rain.
In order to remove carbon a cleaning solution is first applied to break down its chemical bond and it can then be easily removed with the DOFF steam cleaning system.
Protect all windows and doors using a protective film
Pre-wet surface area and apply the cleaning solution
After the correct dwell time remove pollution with Doff steam cleaning system