I have a £40 min charge for con roofs as I really do not like doing them. I did a full valet on Wednesday, the roof is glass so it gets done about every 4 months outside so was not too bad, insides i did last year and were much worse last year than this,plus I am faster with a squeegee now. Its a big conny and i undercharged her a long way at £65 because I know her, It worked out about £17 an hour (including window clean on house which was a normal 6 weekly price on top). If it was anyone else I would of charged her at least £100 for the conny alone.