There seems to be some sort of air vent on the external walls for one chimney but not the other. I haven't seen any air vents for the chimneys inside the building.
Hi, I have two issues with an external wall. One issues is that the pointing in the brickwork below the damp proof course seems to be in a bad state of repair. The other is that there is a damp patch on the wall behind the chimney breasts, and it seems to have an odd "rainbow" shape to it. The...