We had windows and doors fitted over a year ago now and have had nothing but problems ever since. In fact, including today, the firm has been out six times to rectify faults but at least they keep coming back! The windows and patio door sills all bend in the middle. By that I mean there is a definite hump in the middle of all of them. One of the fitters has been today and put packers along the length of the sill. However the problem has not been fixed - there is still the noticeable hump in the middle. I therefore assume the rest are still the same. So would it be reasonable to ask for the windows to be removed and refitted?