Frequently Asked Questions Made with Xara A:  The average asphalt shingle life span is approximately 17-23 years depending on installation techniques, weather, and ventilation.  There are a lot of warning signs that an old roof will show when it is time to be replaced.  -Leaking issues -Excessive loss of granuales -Missing, cracked and curling shingles -Excessive moss and algae growth -Blistering or peeling paint under roof area due to moisture 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:  How long will my old roof last and  when do I need a new one? Q:  What are the black streaks on my roof? Extreme Roogfing, Inc 2680 Rt. 982 Mt. Pleasant, PA 724.838.7695  Extreme Roofing, Inc 2680 Rt. 982 Mt. Pleasant, PA 724.838.7695  Q:  What choices do I have in roofing materials? A:  There are many different options for roofing today and they can vary greatly in price and life span. -Slate  (75 - 200+ yrs) $30,000+ -Tile   (75 - 100 yrs) $30,000+ -Metal (coatings 30 - 50 yrs. metal indefinite if maintained)  $7000 - $20,000+ -Cedar Shakes  (15 - 40 yrs depending on preservatives)  $20,000+ -Synthetic Slate and Shakes  (50+ years)  $16,000 - $20,000+ -Asphalt Shingles  (17 - 30 yrs depending on conditions)  $7,000 - $10,000 *pricing based on an average 2000 s.f. structure Q:  Do I need to tear-off my existing roof? A:  If you decide to go with a new metal roof, 95% of the time you don’t have to remove the old roof. In fact there are some benefits in leaving the old roofing material.  There are a few exceptions, based on the condition of the old material and the structure.  If you decide to install a material other than metal than the roof must be torn-off for proper installation.