I'm reaching out for CP wisdom as I'm not sure how to go about repairing this.
When we started using our master bathroom a water stain started appearing between the exhaust fan and the wall. (Other side of the wall is the exterior/siding). The stain has been growing over the past few years and I can't tell if it has slowed since we've installed a 60 minute fan timer to get rid of the moisture and humidity after showers.
The house was built about 4 years ago however the stain started appearing 3 years ago when we started using the bathroom on a regular basis. Who would I call to get this repaired? A roofing company doesn't seem right because it is inside the house, but a HVAC company doesn't seem right either since it is a stain/leak on the inside of the house and not furnace related. With this in mind, I'm not sure if the leak is coming from the outside of the house in, or the other way around.
Help?
p.s. here is a bad picture of what I'm talking about.
http://www.flickr.com/photos/27856280@N02/6208535344/
