Condensation on aluminum front door

Hello everyone,

we have replaced our front door with an aluminum front door. I am generally satisfied with the door, but I have the following problem. When the outside temperature drops to around 4 degrees or below, condensation forms on the lower part of the door (frame, leaf, hinge). I have attached pictures.

At an outside temperature of 4° C, the lower part of the door still has 14° C, at about 0° C it is only 12° C on the door. This is definitely too cold.

The door components are thermally separated. The door was professionally installed (foil, PE foam) by a company. However, the fitters could not see if the foam had spread completely under the door, as laminate already covered the view under the door on the inside during installation.
Could it be that the condensation formation is due to missing PE foam???

Thank you very much for your help and ideas.

That's a brutal amount of water, room air humidity room temperature?

If so much water condenses at 12°C surface temperature, you are ventilating far too little. How warm is the room?

Condensation occurs when the difference between air temperature and surface temperature is too large. Quote from another source: "Ideal is a humidity of 40 – 50 percent as well as a temperature of 21 degrees Celsius. The temperature difference on the walls should not exceed 2 degrees Celsius and on the window panes 6 degrees Celsius."

In the hallway, the air temperature is about 20 °C. Humidity is around 50 percent. We have already replaced all windows and patio doors with new ones and have no problems with condensation anywhere. The frames of all windows have about 15 - 16° C at an outside temperature around freezing and below.

Anything below 15 °C surface temperature is not acceptable. And yes... we ventilate daily.

Regardless of how absurd that is, without mechanical ventilation you would have to ventilate about 10 times a day by fully opening the windows. At 20°C room temperature, the surface of a reasonable door should not be that cold - as you already mentioned. It is also hard to imagine that it has something to do with the installation. You could stick some Styrofoam on the outside at the bottom and on the edge, then you could at least first see whether it is due to the construction or if something else is wrong.

You can no longer get under or beside the door from the outside. There is now concrete stone laid there.

You probably have to remove the laminate from the inside and then look under the door.