I live in a 1st floor tenement flat.
I had my kitchen window open and as I went close it just bow the handle was sticking. Gave it another good pull and turn and it closed. But as it slammed there was a crumbling noise, like rubble falling.
Under the window ledge sounds hollow.
I’ve heard similar to this where there are old/blocked fireplaces in the property, but only very slightly. This sounded quite significant.
Is this a damp issue?
I feel sick, like my flat is collapsing around me.