To install the internal or external corner, prepare the substructure for a horizontal profile installation. To install the internal or external corner profiles, you must first connect the vertical sub-structure framework using an angle bracket made from an aluminium sheet 2 mm in thickness or galvanised steel sheet (1 mm). Take account of the support profiles when installing the actual sub-structure framework itself in order to position the material thickness of the angle bracket closer to the inside, so as to guarantee that the sub-structure framework is even.
External or internal corner profile can then be installed and fixed to the angle bracket. Please ensure a plumb-vertical installation and pay attention to the positioning of fix and sliding points.
Expansion gaps between the rails must be taken into account. Maintain a gap of 5 to 10 mm for material expansion (depending on the length of the starter profile).
Vertically installed substructures must not join at corners; An expansion gap of approx. 15 mm should be provided. Fix and sliding points should be considered to allow for thermal movement.
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