Exemption from the Building Energy Act

How can I check if the cracks go all the way to the insulation system?

How far can you insert a flat screwdriver or a piece of paper? Do moisture spots already form around the cracks after prolonged rain? These are, of course, only approximations. You can only be sure if you carefully remove a small piece of plaster and check. You can also simulate the rain with the garden hose.

After that, I would first consider the next steps. However, I don't see the facade needing to be redone.