Stop ending sheets prevent water from entering the building through the flashing or capping. It is done by a turn-up tool, turning up the tray between crests at the ridge end of the sheet (Fig.1). Lipping is a process whereby a turn-down tool is used to turn down the tray between crests at the eave end of the sheet (Fig.2). Lipping prevents water from being driven into the building by wind or capillary action. both of these operations can be carried out before or after the installation of the sheets. In the case of the latter, ensure that sufficient clearance is available for the movement of the turn-up/turn-down tool. It is recommended to lip pans of all sheets that have a slope less than 5°.