I have a question (as opposed to a problem, for now anyway)...
Here in the lovely state of Virginia...specifically the "Tidewater" area
because that is where I currently live...the majority of the roofs have this
streaked look...I thought it was due to the gravelly finish being washed off
the asphalt shingles. My father-in-law feels it is due to poor ventilation.
My question to you roofing people out there...could poor ventilation
(lack/low count of soffet vents and/or ridge vents) cause the streaking I
see on 75+% of the roofs in my area?
AND...if vents (soffet/ridge) are critical/important to overall roof
life...then WHY don't the local builders install what is best? I've never
seen this same type of streaking on roofs up north. I orignally thought it
was rain washing off the gravel layer, but now I'm not so sure.