Is your exterior paint bubbling?  This is a relatively common occurrence, causing exterior paint to lose its adhesive grip on the underlying siding or paint layers and “bubble.”  It’s most commonly caused by either underlying entrapped moisture between the siding and paint trying to escape or off-gas (i.e., the paint was applied when moisture levels were too high) or incompatible paint applied over older paint layers preventing chemical adhesion.  Ultimately, the bubbles will burst and crack, rendering these areas unprotected, not to mention “bubbled” paint isn’t sightly.  Good news, it’s not that hard to repair (unless the whole home is “bubbling,” then it’s a bigger job for sure).