The flat is insanely dafty, and not very well insulated
If you are too good at blocking the drafts you may end up with condensation problems if your walls are cold.
Fortunately the abundance of gaps in the flat will guarantee that there will always be some airflow because it would be impossible to seal all the gaps and also keep my sanity in tact.
@Nef started
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If you are too good at blocking the drafts you may end up with condensation problems if your walls are cold.