Write a review Your name* Your e-mail* (Not for publication) Rating ★★★★★ Excellent ★★★★☆ Very good ★★★☆☆ Average ★★☆☆☆ Poor ★☆☆☆☆ Terrible Your review * * — Required information GAF-ELK Materials Corporation ← View details 1611 116th Avenue Northeast, Bellevue, WA 98004 +1 425-646-4993