ᐅ Cavity Wall Construction: Drainage Openings with Cavity Insulation?

Hello,
I am currently building a house. The wall assembly is as follows (from inside to outside):
- 24 cm (9.5 inches) Poroton T12
- 14 cm (5.5 inches) mineral wool cavity insulation, WLG032 (water-repellent)
- 1 cm (0.4 inches) ventilation gap
- 11.5 cm (4.5 inches) Egernsund facing brick (brick veneer)

According to the DIN standard, drainage openings are required. However, there are some publications that consider these openings rather counterproductive (driving rain, pests, etc.). What are your thoughts on this? Are these openings really necessary? I am using a very soft brick (like a common brick). It absorbs water well and also releases it effectively. Even if condensation occurs, it should be discharged well to the outside. Does anyone have experience or advice?
Thank you

This type of wall construction is intentionally designed for thermal insulation and therefore does not include ventilation cavities. The finger gap (a narrow air layer) is considered a stagnant layer, which improves thermal insulation. If the insulation material is permanently water-repellent, drainage openings are not necessary. To promote drying, it is sufficient to leave some of the joint gaps open.

We build our walls with cavity insulation material without drainage openings but with ventilation openings (open joint gaps). Your construction company should be able to demonstrate the proper wall assembly and appropriate sealing in the base area, including detailed drawings and on-site inspections.