Since last year, the inside of our unused chimney breast becomes soaked in high humidity. Brown stains and salt streaks are present.
Thinking this was a leak around the flashing, I decided to simply take down the stack to loft level and extend the roof. This did not cure the issue.
I've since researched the cause on the forums and am now aware that the cause is condensation. However, I cannot find the best solution to solve this issue.
We have an internal vent downstairs and internal vent upstairs where fireplaces used to be sited. I would presume this is sufficient ventilation? What else needs to be done to prevent this condensation from taking place, now that the stack has been removed and the chimney is open in the loft?
Thinking this was a leak around the flashing, I decided to simply take down the stack to loft level and extend the roof. This did not cure the issue.
I've since researched the cause on the forums and am now aware that the cause is condensation. However, I cannot find the best solution to solve this issue.
We have an internal vent downstairs and internal vent upstairs where fireplaces used to be sited. I would presume this is sufficient ventilation? What else needs to be done to prevent this condensation from taking place, now that the stack has been removed and the chimney is open in the loft?