Double-layered masonry drainage openings with core insulation?

Hello, I am currently building a house. The wall structure is as follows (from inside to outside). - 24 Poroton T12 - 14cm mineral wool core insulation WLG032 (water-repellent) - 1cm ventilated cavity - 11.5cm Egernsunder facing bricks (brick) According to DIN, drainage openings are mandatory. However, there are some publications that consider these rather counterproductive (driving rain, pests...). What do you think about this? Are these openings really necessary? I have a very soft stone (like a brick). It absorbs water well and also releases it very well. Even if there should be condensation water, it will be well discharged again to the outside. Does anyone have experience or advice? Thank you

Such a wall structure is deliberately designed for thermal insulation and therefore has no ventilation. The finger gap (small air layer) is referred to as a still layer, which leads to better thermal insulation. If the insulation material is permanently water-repellent, no drainage openings are needed. For better drying, it is sufficient to leave some butt joints open.

We build our walls with core insulation material without drainage openings but with ventilation openings (open butt joints). Your construction company should be able to demonstrate the correct wall structure and appropriate sealing in the base area to you. (Detail drawing and inspection on the construction site)