2007-12-07 09:01:36 · 3 answers · asked by bob p 1 in Home & Garden ➔ Maintenance & Repairs
Its mildew, can be prevented by getting and installing a strip designed to stop mildew, check at your home improvement center,it works.
2007-12-07 09:31:14 · answer #1 · answered by alpete 3 · 1⤊ 0⤋
Mildew or fungus, usually, tho it could also be dirt, on rare occasions.
I know you can get a 'wash' product that will not only clean the shingles, but help kill the mildew and fungus. Here is one such product, I'm sure you can find more - http://www.shinglecare.com/index.htm
Good Luck
2007-12-07 20:44:14 · answer #2 · answered by thewrangler_sw 7 · 1⤊ 0⤋
They always will discolor because they are still black underneath. I have never met anybody who liked their white or grey shingles after the first year.
2007-12-07 23:58:06 · answer #3 · answered by sutla 3 · 0⤊ 1⤋