Atlas Roofing is our primary asphalt shingle manufacturer because the combined package — product performance, certification tier, warranty structure, and color library — delivers the strongest combined coverage on an asphalt system at a price that rewards the choice.
Algae resistance calibrated for PA humidity. Atlas shingles carry Scotchgard Protector — a 3M-engineered algae-resistance system embedded in the granules, not sprayed on after manufacture. Streak-staining from gloeocapsa magma (the bluish-green algae that darkens north-facing slopes across the Lehigh Valley) is one of the most common cosmetic roof complaints we see. Humid summers from June through September here are exactly the conditions that produce it. Atlas's Scotchgard system is the strongest algae-resistance warranty we've worked with.
Performance in Lehigh Valley weather. Climate zone 5 freeze-thaw cycles punish poorly bonded shingles. Atlas's Core4 technology (a four-layer impact-resistant design available in the Pinnacle Impact profile) handles both the freeze-thaw stress and the occasional hail event the valley sees. Wind rating on the Pinnacle line runs to 130 mph with correct fastening — well above what we've ever measured on a local weather event.