Every year a homeowner should check the roof, or hire a roofing expert to check the roof, for debris. Debris can gather in any place with an obstruction, like an HVAC unit, pipes, or chimneys. The problem with roof debris is that it can retain water and cause problems with your roof’s drainage system and possibly roof deterioration. The gutters and drain spouts should also be checked for leaves and debris. You or the roofing expert should also make sure all flashings are in good condition and functioning as designed. If not, you should have them replaced by an expert. Another common roof problem is moss or algae growing on the roof. This means that the roof is in an area that is shaded and damp, ideal conditions for growth. Zinc control strips can prevent the growth of moss and algae. Talk to a roofing expert about having them installed. By following these preventative maintenance steps, your roof will stay dry and intact.