Moisture in the laundry room - ventilation or dehumidifier?

Yep, we are currently using a dehumidifier with condensate drainage. It costs us about 3.8kW per day... Not cheap, but better than a damp basement. A duct fan is planned for the medium term.

Not cheap is relative. If you know that a new sealing of basement walls in an existing building starts at a minimum of 40k. You can dehumidify for a long time, like 100 years. And even then, washing machines and dryers naturally produce a lot of condensate. What about a dryer with an air outlet to the outside? A core drilling might cost around €200 including travel. At the same time, air exchange takes place. PS: I was at a construction site next to a medium-sized river last week. There, the basement was sealed with a plastic epoxy resin coating. 25kg costs €150 and is enough for 2.5m² :D just material, without labor.

Yeah, not cheap is relative. If you know that a new sealing of basement walls in an existing building starts at at least 40k.
You can dehumidify for a long time, like 100 years.

And even then, washing machines and dryers simply create a lot of condensate.
What about a dryer with an air outlet to the outside?
A core drilling might cost around 200€ including travel.
At the same time, an air exchange takes place.

PS: I was at a construction site next to a medium-sized river last week.
There, the basement was sealed with a plastic epoxy resin sealant.
25kg costs 150€ and covers 2.5m2 :D just material, no labor.

Our basement absorbs moisture even though we don’t wash/dry there. Otherwise, we would have done the drilling by now.

But that’s okay, as you say: with 400-500€ electricity costs per year for a dry basement, a renovation wouldn’t be worth it, especially since we only have a partial basement, making it difficult to get to from the outside.
We are satisfied with the improvised solution, and so is the basement.

Addendum: The basement used to be ventilated (a nice way to say “had no window panes”). There was no problem with moisture, but it was energetically catastrophic, since the heating was also in the basement which was cold, and we had freezing drafts and cold floors on the ground floor...
That’s just how it is with old buildings: There’s always something...

Sure, check out #2.

: where are the answers? It would be helpful.

Please pay attention to the units…3.8 kWh ;) (3.8 kW (power) cannot be billed…)

Hi everyone,

Thank you very much for your numerous inputs and advice, and sorry for my late response. I was a bit knocked out the last few days.
We have now tried airing out, especially in the mornings, and the humidity then quickly drops to around 60%. I think in summer this only works in the morning or evening. Otherwise, I will observe it throughout the summer. A friend of mine said yesterday he had the problem in the bathroom and made a core bore with a fan to the outside, which switches on at 80% humidity. That works very well for him at least. That might also be an option.

In winter, a quick airing is usually enough for us, only in summer do we have a little problem with moisture. That’s why we got a dehumidifier for the warmer months.