"I used Corotherm 980 and 700 x 10mm x 3 Mtr polycarbonate roof sheets and Corotherm fixing components. All fitted well with exception of the F section ends which would not stay vertical. The glazing bars, which I considered expensive for what they are, were not all 3 metres long as ordered. They varied in length up to 15mm which meant a slight trimming of some sheets. Not an arduous chore but time consuming, perhaps they can look into this problem. Also when delivered 2 glazing bars were missing. Screwfix were brilliant in arranging quick delivery of the outstanding bars. All fitted now and looks good."