Very popular is the implementation of the roof soffit and its plastering with facade plaster. Many people underestimate this detail and do not implement it correctly. They do not realise that many times rainwater fills the gutter and it overflows so that it drenches the roof soffit. The polystyrene used is like a sponge and this is why the water continues to run down the façade. This phenomenon then causes unwanted maps to form. This can be seen very clearly in the attached picture.
This way I want to recommend you to use eaves profile No. 3794 from the underside of the roof soffit and insulate the eaves system with extruded polystyrene. This will simply prevent damage to the façade in the soffit section of the roof.
