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Answers from contractors near Haverford, PA

black spots on the roof. can you tell me what is the cause of this? have lived in this house 12 years and have had no problems. what can you do to clean this?
Over a period of time, shingles may develop dark brown or black streaks that are sometimes mistaken for soot, dirt, moss or tree droppings.  In actuality, this discoloration may be caused by algae gro ... read more
What's the best way to test out if my roof is leaking before it rains?
One easy way is to simply go into the attic space and look around and see if there is any staining on the underside of the ply wood.  The most common areas are around pipe and chimney penetrations, in ... read more

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