Was listening to the news this morning and this story caught my ear. Did you have a home or addition built from 2002-2007, is so this info. may pertain to you? Basically, as many as 60,000 homes may be affected by faulty drywall. From 2002-2007 the Knauf brand of drywall has been causing all kinds of problems in peoples homes. Everything from a strange smell, health releated issues, wiring turning black and black spots starting to appear on anything metal based. Florida is the hardest hit due to their weather. The weather sped up the process in Florida and other states will follow. Here is the story.
The news story I listened to stated that the Knauf brand is stamped on the side of each piece of drywall. To see if you may be affected they suggested you look at your lightswitch or wall socket wiring. If it is starting to turn black you are in for one heck of a ride. I hope that no one at CP is affected.