DIY Doctor UK DIY Forums

In the process of having my flat roof redone and insulation added to my ceiling the ceiling pb was taken down and there is what appears to be a missing brick/gap in the corner of my room just below the joists. Would anyone be able to advise me if there is a reason for this and whether I should fill it in or leave it alone.

Any advice much appreciated.
Thank you

Hi whichwayisup,
Can see no reason for this unless there used to be a vent brick. If it does not go through the full wall width you may as well seal it up with another brick.
Regards S