Insulating basement walls from the inside, correct construction

Good day

I would like to insulate the walls inside this basement (see photos). It is a hobby room that will be heated sporadically. With the 45cm concrete, it hardly gets warm.

The concrete wall is in contact with the ground. Sealed outside with bitumen membrane (with aluminum layer), drainage and 13cm foam glass. The foundation is not sealed. Inside, the basement floor is already sealed with bitumen (aluminum) for the floor structure. 15cm insulation will be placed on top.

The plan for the inside is:
- Bitumen thick coating
- 3cm wood wool
- 10mm ventilation gap
- Fermacell H20 board with lime plaster

What do you think? Could this work?

Thanks for all tips and regards

Michael

Hi, unfortunately it has been too long since I dealt with this. And I disposed of my Wendehorst 20 years ago :-( But insulating on the inside is fundamentally worse than on the outside. Is insulating more on the outside no longer an option for you? If insulating on the inside, then calculate the dew point, and from a gut feeling, it could be in the area of the interior thick coating or the 3cm wood fiber insulation board. That would then cause it to "rot away" because the (room) moisture condenses there. This leads to mold and all the unpleasant consequences. There are definitely people here who can "quickly" calculate this if you post a sketch with the exact wall structure (material, thickness + thermal resistance). Here you can possibly calculate it yourself if you know all the values. The 13cm Foamglas (foam glass gravel as a board?) would already be a certain insulation ... Whether 3cm wood fiber insulation board would really help further? Oh... heating sporadically? The enormous mass of 45cm concrete walls will take you an estimated earliest three days of continuous heating to get up to temperature! That explains the nonsense of most night setback heating systems. So you will probably always have to heat at least a little so that no component cools down completely.

Thank you for the response. The basement can only be heated with a wood stove. I have done the dew point calculations. (ubakus): No problem. However, the moisture of the unsealed foundation cannot be taken into account. At another place, a more diffusion-open insulation material was recommended to me (Porenbeton- Ytong).