ᐅ Stone column in conservatory damp

Hello,
we have a conservatory with triple glazing that is heated together with the living area.
Inside, there is an uninsulated stone column, located next to the windows. (The stone column is from the original construction.) I understand that this is not ideal from a thermal perspective, so please do not provide advice regarding that.
Unfortunately, the stone column gets completely wet because it is the coldest spot. What can be done about this besides wiping it down?
Is there any way to prevent the moisture?

Only if you heat it.

Sure, but only when I’m heating.

Well, you asked the question without providing any further details. This is the answer. As long as the column is the coldest point and, if I understand correctly, is in contact with the outside environment, nothing will help except balancing the temperature. Otherwise, moisture from the air will condense exactly at that spot. It’s basic physics.

Heating can be done in various ways. A warm airflow directed along the column might be sufficient.

Another option would be to prevent the air in the conservatory from dropping below the dew point in the first place by heating the entire space. However, this would probably be too expensive. Alternatively, you can avoid allowing the air to release moisture by keeping the humidity very low (constant ventilation, dehumidifier).

Here are some ideas

• Direct warm airflow along the column.
• Use infrared heat targeted at the column.
• Attach heating wires to the column (similar to rear window defrosters in cars).
• Properly heat the entire conservatory.

The stone temperature must be above the dew point, as mentioned before.

Insulating the exterior.
There’s no economical solution for this. Placing electric heaters in front and running them around the clock would help, but it would cost you about 3-400€ in electricity per year.