Blocked Roof Dryer Duct

In the out-of-sight-out-of-mind department: a recent inspection reviewed a dryer exhaust exiting through the roof. Roof exits are unconventional, since they cannot be readily inspected or cleaned. In this example, the exhaust duct cover has become blocked, and the dryer was exhausting into the attic. Moist air and lint in the attic space can rapidly deteriorate building materials and a blocked dryer duct can pose a significant fire hazard.