2006-07-16 05:46:47 · 6 answers · asked by Joan B 1 in Home & Garden ➔ Other - Home & Garden
Maybe they are "skidmarks" from the rear ends of squirrels as they slide down your roof at night.
2006-07-18 13:14:59 · answer #1 · answered by Zippy 3 · 0⤊ 0⤋
In addition to algae and fungus, the stripes could indicate that the shingles are becoming worn or have been damaged by hail or excessive wind. I'd call a local roofing company for a free evaluation.
2006-07-16 05:51:01 · answer #2 · answered by Chainsawmom 5 · 0⤊ 0⤋
most likley their is not enought ventilation going from the soffits to the attic. in hot weather after a few years they will start streaking. i have the same problem when i built my house i should have added the chuts inbetween every joist from the soffits to the attic. for more ventilation. not much you can do now. when it time to reshingle im going to put black shingles on.
2006-07-16 09:13:03 · answer #3 · answered by Bighorn 4 · 0⤊ 0⤋
Algae
2006-07-16 05:49:38 · answer #4 · answered by kojak0527 4 · 0⤊ 0⤋
algea......... spray it with bleach and rinse with hose......... put copper strips under the top row of shingles and it won't come back
2006-07-16 05:51:08 · answer #5 · answered by Anonymous · 0⤊ 0⤋
It's dirt and mildew. Unavoidable. Just have it cleaned once in a while.
2006-07-16 05:50:51 · answer #6 · answered by Ricky J. 6 · 0⤊ 0⤋