Take a moment to examine your roof and check for "popped nails." These are nails that were used to secure roofing shingles that have popped up over time. Humidity, environmental factors or simple warping can cause a few nails to loosen and raise up. Why is this important to address now? Because a popped nail means there is a small hole where water can seep in and create damage. If you live in an area that is prone to heavy storms, it also could be an area of the roof that "lifts" during a storm, creating even more damage. If you see several popped nails, have a professional fix them.
ANDREWS MCMEEL SYNDICATION