My VERY old father stupidly signed up with a door-to-door salesman to have his roof cleaned of moss with a pressure hose, de-mossed, and the sealed. Worse still he then waivred his right for a 7 day cooling off period in return for a minor discount. Staggeringly to me, the quote for his 4 bedroom 1970s house - which the company claims has a 250 sq m roof - was over £6000 and the work was done in 6 man days before I knew anything about it or could stop him. From everything I've read the price should be significantly less. Can anyone tell me ASAP what they think a realistic price woudol be for such a job? Thanks in advance for any advice or help anyone can give