I have a job cleaning high facias and the outside of the guttering,I HAVE A SMALL KARCHER POWER WASHER ,however I need an extention any ideas wher e to purchase one from,the client has a normal two storey detached house.Also would non caustic T.F.R be affective with the power washer as the facias , guttering e.t.c are in a bit of a state . THANKS