I have just had a GAF Timberline IR shingled roof installed, but when doing my own inspection I noticed a bit of green mildew along the edges of many shingles and some parts of the roof you can see the discoloration. So much for “Stain Guard” right out of the package (The shingles did arrive on pallets in their packaging). Not all the shingles are like this but many are, perhaps 30%.
Upon further investigation the singles were manufactured in 2012, so they were sitting around all that time (nearly 6 years), and the supplier said it was because not many people in Texas buy hail impact resistant shingles.
I have crawled around the roof and taken 50+ pictures.
The real question is whether this is something to be worried about, or will it all burn off in Texas 100+ degree summer sun? We have no trees shading the roof. Should I press the contractor to have the roof professionally sprayed for mold/mildew? Just throw some Spray & Forget on it myself (is that stuff any good really?) Who is at fault? GAF product, the supplier, or the contractor?
Serious concern or is it one of those “it happens” issues when 200+ bundles of shingles are sent from a warehouse?
Thanks for the help.