Extreme Metal Roofing Supply Made with Xara Extreme Roogfing, Inc 2680 Rt. 982 Mt. Pleasant, PA 724.838.7695  Extreme Roofing, Inc 2680 Rt. 982 Mt. Pleasant, PA 724.838.7695  Facts and Misconceptions about Metal Roofing A:  Most metal roofing is can be separated into three materials. -Copper: Used a lot in the past but due to current cost  it is used sparingly -Benefits:  Long life, weathers to a pleasent green. easy to work with. A:  The black steaks that you see on many roofs are a type of algae growth.  The reason for this algae is that the shingles never have a chance to dry out completely.  This can be caused by shade, lack of direct sunlight or by aging shingles absorbing moisture.  The roof can be cleaned but this tends to do more damage than what its worth.  The best solution if you have this condition is to get a painted metal roof since metal sheets water away quickly which doesn’t allow moss and algae to grow. Q:  What type of metal is the roofing? Q:  What are the black streaks on my roof? Q:  What choices do I have in roofing materials?