Leaking around chimney stack

[Brenty 10]

We live in an Edwardian mid terrace and have a leak in our upper front bedroom adjacent to the chimney stack we share with our neighbours.

 

Despite two separate roofers replacing the lead flashing around the stack, repointing the stack fully and re-doing the channel between ours and the neighbours' tiles, it's no better.

 

It's seeping rather than leaking and is noticeably worse after it rains and leaves a sticky, slightly dirty residue once it dries.

 

The second roofer is coming back to take a look, but I'm not sure he knows exactly what the cause is.

 

Could this actually be due to our neighbour's roof? They say they've also got a problem on their side and are having loose tiles sorted in the coming weeks.

 

I wonder if there is any merit in taking off the plaster down to the brick to identify and treat the source of the leak? If so, who does this kind of thing?!

[robthesweep 10]

We had the same problem in an Edwardian end terrace with three chimneys. Sealing the stacks with water repellent worked for us........ after trying everything else !

[Brenty 10]

Thanks for the reply. We've had the bricks sealed from the outside on our side where the pointing has been re-done. The neighbours are having a few tiles replaced and repointing their side of the stack in a few weeks.

[mpnuttall 10]

Hi Brenty

 

We've been having this same problem and wondered if your brick sealing solution had worked? If so, who did you use and would you recommend them?

 

Thanks so much, Mark