The risk of water ingress into the roof cavity when pressure cleaning is very high. This may cause damage to internal ceilings, electrics and walls. Check your insurance covers damage caused by pressure washing beforehand. Insurers are well versed with the risks associated with roof pressure washing. Don’t take our word for it, speak with your insurance company beforehand. High risk of broken tiles, and damage to roof pointing. High risk of damage to the coating on concrete roof tiles, resulting in a significant loss of colour and exposing the bare concrete. Most roof warranties will be voided by pressure washing, check with your supplier if your roof is still under warranty. High risk of damage to old repairs resulting in leaks. High risk of significant pollution run off into local creeks. High risk of roof debris and roof oxide staining on yours and your neighbour’s properties. High risk for the cleaning technician, increasing the risk of a serious accident at your home.