My house is approx 14 years old. It is brick and block construction and insulated with what looks like polystyrene balls.
The en-suite is on an exposed south facing external wall. It has a single window approx. 900h x 500w and a 120mm fan (replaced about a year ago ). The room it self is about 1800 x 2400.
The window tends to be left open most of the time we are in the house and the fan is used when showering and is on a timer for about 10 minutes after switching off.
On the wall above the window and the ceiling above that, in a patch that extends about 500mm into the room, there has always been mildew.
I am wondering if we are drawing cold air in the whole time we have the window open and if it would be better to leave this shut and just use the fan.
Does anyone have any other ideas ?
Also are there any safe smoke testers that could be used to check the fan is working OK ?
The en-suite is on an exposed south facing external wall. It has a single window approx. 900h x 500w and a 120mm fan (replaced about a year ago ). The room it self is about 1800 x 2400.
The window tends to be left open most of the time we are in the house and the fan is used when showering and is on a timer for about 10 minutes after switching off.
On the wall above the window and the ceiling above that, in a patch that extends about 500mm into the room, there has always been mildew.
I am wondering if we are drawing cold air in the whole time we have the window open and if it would be better to leave this shut and just use the fan.
Does anyone have any other ideas ?
Also are there any safe smoke testers that could be used to check the fan is working OK ?