Old chimney stack to outrigger (Damp)

[mario500]

Hi lads. I normally reside in the combustion chamber, but have a building question.

This is a terraced house over a 100 years old with a joined chimney stack at the back of the outrigger. The chimney was bricked up years ago a d since then the end run of kitchen units butted up to it.

About 5 years ago I took the units out, removed the plaster, injected the cream damp course, (Name of it escapes me). Then cement rendered it with a skim coat. I treated the bare bricks with a waterproofing too.

So the damp is back, although nowhere near as bad. My question is can an air brick fitted to the outside going right into the chimney prevent the damp?
I know it should have been fitted to the inside, but hey ho. I didn’t fit the kitchen, just trying to get this right before it gets rented out.

Thanks I’m advance.

 

[CBW]

Can’t really see the top section,but the 1st photo of ground floor looks like either rising damp ar transference from the adjoining wall (or is that the outrigger - not heard of one).

 

[catlad]

Looks like a solid wall to me, if the stack is not in use anymore then I suggest it gets taken down. outrigger = annex

 

[mario500]

The stack is shared, so can’t be taken down. It should have an internal air brick, but some silly sod bitted the kitchen up to it.

I’m thinking that it’s worth capping the pot with a vented cowl. I think the bad pointing on the chimney is causing water ingress too. Maybe the flaunching is bad too.

 

[catlad]

Well it might be a shared stack but like you they may have given up using it 10yrs ago.

 

[JohnD]

I've had an old house, and I found that taking down the chimney, and roofing over it, was expensive but saved future maintenance and potential damp. In my case the flues were taken down into the loft and left open, which keeps them ventilated, though a few torches and other tools fell down inside over the years.

It is best to open the fireplace and shovel out the builders rubble and soot, which hold damp. That might also be the source of your damp patch. Can you take out a brick, have a look, rake it out?

Is that an old drain or gulley I see?
Probably broken and leaking.