Insulating basement ceiling from the inside

Hello everyone and first of all, a quick hello to the group. So winter is approaching and I would now like to devote myself to a task that has been on my mind for a while. I want to insulate the basement ceiling from the inside in a house built in 1960. The rooms office (1 heating), laundry room and hallway no heating I wanted to equip the basement ceiling with insulation material, all in all about 25 sqm. The reason is that everything on the ground floor is tiled = cold floor in the living room, etc. What materials would be suitable here? I was thinking in the direction of Styrodur to put on the ceiling. What about mold or similar, do I have anything to worry about because the basement is kept rather cool? I am grateful for any tips. Regards Bert

Hello,

...I want to insulate the basement ceiling from the inside in a house built in 1960....

What is interior insulation? Interior insulation is not without problems (moisture, condensation). Normally, a measure is taken against the event. Usually insulation is applied on the "cold side"! If that is not possible, the choice of building materials is limited! Calcium silicate solutions have proven to be useful for interior insulation. Interior insulation is defined based on temperature differences, not based on the location of the building component. This should be a completely normal insulation on the cold side.

..., all in all about 25 sqm....

What "gigantic" effect is to be expected overall from this? Possibly, optimizing the existing heating system overall will yield significantly more than insulating 25 m² of basement ceiling ;-) best regards

Hiho Thanks already for the info. First of all, I want to try to get the problem of cold feet+heating at home a bit under control.^^ Since the basement rooms 2pcs+passage are used rather rarely, I wanted to try it like this first. There is a radiator connected in the office room. Just wanted to see how I can get away cheaper with it:-) Regards