What’s a “roof leak”?
For most people, a roof is leaking when the ceiling gyproc starts to discolour, or bulge, or when the paint starts to bubble.
This usually happens after a heavy rain, or at the end of winter when the snow is melting off the roof. Yes, those are usually leaks. They are easy to notice and impossible to ignore. However, the sad thing is that the cause of the leak is usually several years in the making, and by the time the leak is noticed, there is lots more damage that has occured. In other words, the apparent and visible leak is preceded by “invisible” leaks that start (often) many years before the leak is apparent. This post is about these invisible leaks.
Consulting PG 