The man you sent to do the work was
clean in appearance, considerate in his approach and tidy in his working practices. When it comes to roofing only time will tell but I think I have good reason to believe that the quality of his work matches his other good qualities.
My purpose in writing is to express my
appreciation of the speed and efficiency at which you organised and carried out this work. You fielded my request one day, got the estimate to me on the second day, did the work on the third day and I got a receipted invoice on the fourth day. If you are trying for some kind of record I will happily sign your petition.