Where a few sheets are required to cover the whole length of the roof due to handling or transport considerations, installation shall start from the bottom to the top before moving on to the next run of roof. At the end laps, a minimum of 250 mm end lap is required for a 5˚ roof pitch and below, and a minimum of 200 mm end lap is required for a roof pitch exceeding 5˚. To ensure water tightness, apply a good sealant to the end lap.