Humidity in basement apartment

So it probably isn’t due to the insulation but apparently due to the tenant’s behavior. However, this is presumably not a reason for compensation. Even if it is annoying that according to the report he still hasn’t moved his furniture away from the wall. That will be expensive!

I will probably have to draft a comprehensive additional agreement to the rental contract outlining everything he is not allowed to do.

- Ventilation at high outside temperatures (describe ventilation in detail)
- no drying clothes in the apartment
- no furniture directly against the wall
- .......

Never again an apartment as an investment property for renting out!

- Ventilate when outside temperatures are high (describe ventilation in detail) - no drying laundry inside the apartment - no furniture directly against the wall

What a mess... As a landlord, I would tell you a thing or two.

Such crap... But I would tell you something as a landlord.

That's what the expert told me. What am I supposed to do? I can't renovate and then it molds again.....

Talk to him, maybe he will understand it better then. Give him these salt dehumidifiers and he should place two in the apartment. Maybe that will be enough.

Just google it

Mold in the separate property – the administrator must investigate the cause

You end up on a lawyer's page that deals with the issue of cost bearing, including for the assessment. Do I understand correctly that according to these rulings, the property management / owners' association now also has to bear the costs for the expert, even though no damage to the common property was shown through the expert's involvement and excavation? I read that the management is obliged to follow up on damage to the common property or to rule it out. However, there is nothing about passing on the costs.

What do you think? The property management is already asking how the costs should be settled.

I probably have to draft a comprehensive supplementary agreement to the rental contract specifying everything he is not allowed to do.

- Ventilation at high outside temperatures (describe ventilation in detail)
- no drying laundry inside the apartment
- no furniture directly against the wall
- .......

Your tenant would be very ill-advised to sign that. And what would motivate him to sign a supplementary agreement?

Where do you think he should dry his laundry??

For me, the report is not really appropriate either. The mold is supposed to come solely from (too much) ventilation in the summer? Sure, warm summer air has high humidity—but that doesn’t lead to damage on that scale! There must be something wrong with the building fabric. I suspect the insulation is inadequate/defective. That’s why there is increased mold growth in the corners and near the floor.

I wouldn’t stay a day longer in the apartment instead of your tenant. This extent of mold infestation is highly hazardous to health!