sweating windows; condensation on the inside glass ; mould

[Shoshana Shulman]

My tenants keep the double paned windows closed all fall, winter and most of spring. They don't use heat because they don't want to pay for it. The air-tight windows get condensation on the inside glass, to the point where it is dripping from the bottom of the window inside the house. Black mould is growing in various places. After I consulted the builder of the apartment, and researched this online, the conclusion was that the mould is coming from humidity inside the house and the lack of air circulation. It was recommended that the tenants crack the windows open for a limited period of time to allow for air circulation and the exit of excess humidity build up. They refuse, saying they are not going to freeze. Does anyone have any advice? I think they might be gearing up to sue me, or who knows what.

[Thomas S.]

@Nathan Gesner

I would agree except this type of tenant is not going to respond to a landlords requests. Best to do damage control and get rid of them asap. If they are not M2M or close to the end of their lease I would issue a cure or quit and proceed to evict if necessary. Hopefully there lease is almost up.