I was quoted a price of €550 for power washing my semi d (plaster finish) and removing moss from the roof (only present on north facing side). This quote seems excessive - any comparables out there ?
I think it is too high a price. I got the sides of a bungalow done some years ago, they were terylene dash and it was a great job. However I then bought a washer and it has paid for itself since...marvelous for doing patios etc. Its a messy job and with a domestic washer can take a few hours .