Our Victorian ground floor conversion flat has a toilet that suffers from condensation or damp (see picture). The room does not have heating and no external ventilation other than through a trickle vent in a modern window and is accessed through the bathroom with limited ventilation. A damp proof was installed in 1980s but no idea about its effectiveness.
About 5 years ago, a damp proofing specialist came out to do a survey and recommended installation of an extractor ventilator that was triggered by level of moisture. He didn't find damp to be the cause. But we were unconvinced because never found extractor fan particularly effective and also they need to draw air. More recently, we asked a builder if it was possible to do some limited dry lining in the effected area. He spotted a crack in the external render and suggested using a membrane to prevent moisture getting in. However, this does not seem correct if the problem is condensation caused by a cold wall? I though of drilling holes in the wall for extra ventilation but that would make the room even colder!
We would appreciate any suggestion of how to cure this problem or if anybody has successfully tackled it. Thanks in advance.
About 5 years ago, a damp proofing specialist came out to do a survey and recommended installation of an extractor ventilator that was triggered by level of moisture. He didn't find damp to be the cause. But we were unconvinced because never found extractor fan particularly effective and also they need to draw air. More recently, we asked a builder if it was possible to do some limited dry lining in the effected area. He spotted a crack in the external render and suggested using a membrane to prevent moisture getting in. However, this does not seem correct if the problem is condensation caused by a cold wall? I though of drilling holes in the wall for extra ventilation but that would make the room even colder!
We would appreciate any suggestion of how to cure this problem or if anybody has successfully tackled it. Thanks in advance.
