Testing of Impact-Resistant Asphalt Shingles (original) (raw)

2020, INTERFACE

Impact tests were conducted for five different shingle designs from four different shingle manufacturers. All of the shingles were advertised as having UL-2218 class ratings, including four CLASS 4-rated shingles and one CLASS-3 rated shingle. Shingles were installed on test panels and subjected to steel ball bearing drops in accordance with UL-2218, and duplicate panels were subjected to ice ball impacts in accordance with ANSI FM-4473. Upon completion of the impact testing, shingles were examined for pass/fail criteria as listed in each standard. We found that none of the five shingles adequately passed either UL-2218 or ASNI FM-4473 which calls into question the validity and quality of hail impact resistant asphalt shingles.