Types of Rainscreen Corners
There are a few types of rainscreen corners. The first and easiest is a butt joint, which leaves a small open joint between the two panels that make the corner.
STENI offers a fused bent corner to create an L or U-shaped element that is completely closed. These elements can be created in a wide range of right and obtuse angles.
Petrarch has a closed corner using either adhesive or a mechanical fix, and these can be made into L or U shapes as well.
These are primarily aesthetic preferences.