Since our square steel gutters are not symmetrical, we offer both internal and external corners.An external corner is used on an outwards corner that protrudes from the property, such as one of the four corners of your house or an outer corner of an extension. These corners are fitted with fold over tabs that ensure any lengths attached to it are firmly locked in place with an easy fitting process.Please note, the external corner does not feature a seal and should therefore be mounted directly with the gutter using steel glue. Once mounted, press the glued area down and bend the mounting plate. Finally, make a tight joint with glue on the edge of the gutter installed inside the corner. Please make sure that there is 7cm overlap when joining corners with lengths.