Correct contact person for calculating internal insulation

Hello,
our old building has now been completely gutted inside, plaster removed, floors taken out and excavated, etc.
The house is to receive internal insulation made of wood fiber insulation boards or optionally Multipor. Who should I best contact for the calculation of which material thicknesses can be used for the insulation (keywords dew point, vapor flow, etc.)
Thanks for your tips

Contact your energy consultant :)

To whom should I best turn to calculate which material thicknesses can be used for insulation (keywords dew point, vapor flow, etc.)

Someone knowledgeable in building physics

Contact your energy consultant

I assume you suspect a construction project in Germany. However, according to the thread history of the OP, it is about a property in Hungary, so nothing within the scope of the Energy Saving Ordinance or KfW programs, which are probably more the domain of energy consultants.

Right, the house is located in Hungary. Does anyone have a contact for me who can calculate this for me – of course for payment? Preferably via PM.

Hello,
our old building has now been completely gutted inside, plaster removed, floors taken out and excavated, etc.
The house is to get internal insulation made of wood fiber insulation boards or alternatively Multipor. Whom should I best contact for the calculation of which material thicknesses can be used for the insulation (keywords: dew point, vapor flow, etc.)

I can't recommend anyone to you, but I can still give you a good tip.
Go to xxx.ubakus.de/u-wert-rechner/
Many energy consultants also use this to calculate. The demo version is sufficient for you. 99% of the time the result will also be confirmed by a professional (confirmed by personal experience). Of course, they can also suggest alternatives, which such a "dumb" calculator cannot do. But at least you will then know in which direction your insulation can go.

Very interesting! I have uploaded the result as screenshots:









As far as I understand, I can work with wood fiber boards with a thickness of 80mm.
As a test, I tried 100mm insulation, but then I get over 100 days of drying time in summer.
At the house location, it rarely drops below -5 degrees in winter. In summer, however, it is 30 to sometimes 40 degrees for many weeks.

I hope I am interpreting the result correctly.
What do you say about the result? Can the insulation work like this?