This commercial building had some bad wind damage to the shingles and badly needed replacing. Unfortunately, I don't have any pictures before it was completed, but it had a single layer of 3-tab shingles. 3-tab roofing is very susceptible to wind damage and is known for blowing off during wind storms. This roof had been repaired many times previously with all different colors of shingles so it was definitely time for a new roof.
The material installed is Pabco Premier Weathered White. It was installed right over the first layer of shingles using 1 3/4" nails. All new metal vents and pipe flashings were used and a Trimline ridge vent was installed to vent the roof.