Re: Corroded balcony leaking to unit below › Forums › Common Property › Corroded balcony leaking to unit below › Current Page 19/11/2014 at 5:21 pm #22610 sassa Hopefully more will write too. Not not sure why but the OC thinks otherwise because the slab is under the door and the door is lot owner responsibility since pre 1974. it is clear that the issue is moisture in the concrete slab.