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Paint Smell & Respiratory Ailments

Q. We live in an 1800 sq ft ranch home. Three weeks ago I repainted our bedroom ceiling and walls. I used ceiling paint that was about 7 yrs old. It mixed well so I assumed it was fine to use. After applying the paint I noticed an odor unlike any smell I had ever experienced before. It was so strong that we couldn't sleep in the room for the first few nights. I placed an air purifier in the room which helped a little. The bad paint smell has diminished a little but it is still quite noticeable.
Can paint go bad? Can it make people sick? Is it possible that the paint could be responsible for the respiratory difficulties that my wife and I are presently experiencing like coughing, body aches, congestion and respiratory problems? I was diagnosed recently with pneumonia and my wife seems to be experiencing the same symptoms. Our 20 yr old son who sleeps across the hall from us is experiencing similar symptoms which have caused him to miss school this entire past week.
Should I be concerned of the possibility that this is not a coincidence? Is there a way to have our room tested for some other contributing factor?
Any help or direction you could offer would be greatly appreciated.

A. Get out of your house! Your environment seems to be moldy and unhealthy from what you describe.
I suspect your 7 year old paint is bad, probably moldy, and is probably contributing to your respiratory ailments. Latex paint is smelly but not usually a really bad smell.

I strongly suggest that you seal over that paint pronto with a nasty smelly KILZ solvent primer and then paint your room again. You must really seal the old paint to block the smell, which I believe is mold. This sealing process is similar to the fire and smoke abatement methods used in houses that had fires and smoke damage.
Imagine the organic growth culture that resulted from keeping your paint can closed, warm and wet inside. Think of what happens to water or moisture (like latex paint) when enclosed in a relatively warm environment with no ventilation for seven years? I suspect you have potentially created quite a biological Petri dish of organic culture. Then spread that growing, moldy culture in liquid form all over a massive square foot area where it can out-gas with super ventilation into a living environment for humans. Wow! Drywall compound also gets moldy over time for the same reason and gets discarded after a short time of storage.
Paint soon and ventilate the rooms well. At least change the air often with open windows until repainted!

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