Damp Patches - Internal Chimney Wall

[NicShack]

I have recently had some damp patches appear on an internal chimney brest wall. They do not start at ceiling level but lower down the wall on the upstairs landing. I have checked the chimney brest in the loft space for any signs of water/damp to rule out problems with the flashing - all is dry. I have one fireplace which houses a gas fire that is used rarely but to cowls or simular on the chimney. One I guess is from the old boiler?? The chimey has a vent on the ground floor. Could this be caused by the terrible weather we have had recently? Rain wither coming down the chimney and soaking through the wall?? An advice would be much appreicated. We have lived in the house for just over a yr so do not know if this is a ongoing problem but never noticed it before. The patches are growing in size when it rains.

Untitled

• NicShack
• 1 Jan 2013
• 1

Untitled

• NicShack
• 1 Jan 2013
• 1

 

[JohnD]

are these chimneys all ventilated top and bottom to permit airflow?

 

[dann09]

1. There's quite a bit of information ref. this very problem if you research on this forum.

2. Perhaps a chimney stack inspection is required - the flaunching might have perished. Likewise, the brickwork and pointing.

3. You really should determine which appliance is venting into which flue and if say a flue liner is present.

4. Is your chimney on a gable?

5. Has the flue with a vent been smoke tested for blockages or cracks?