Originally Posted By: mpatton
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I am looking for an explanation of why a roof will streak with discoloration.
Example: A home that is sitting out in the open away from any mature trees typically with a very light colored roof. The roof many times only on one side will have dark streaks starting anywhere between the ridge and the eve, continuing to the eve.
Often a home with similar circumstances and age of roof next to it does not have the same streaking.
I have heard different reasons for this any one want to give their opinion "cause and effect theory"