Observation: Shingles have blown off.
Performance Standard: Shingles shall not blow off in winds of less than 40 miles per hour.
Corrective Measure: If shingles blow off in winds less than 40 miles per hour, the remodeler will replace them with new shingles.
Discussion: Shingles blow off because of high winds, improper fastening (such as installing too few fasteners, or fasteners that are too short), installing staples perpendicular to the ridge instead of parallel to the ridge, or poorly sealing shingle tabs. Whether or not the wind that blows off shingles does exceed 40 miles per hour generally is difficult to determine. The local weather station may be able to provide circumstantial evidence by substantiating that winds exceeding the 40 miles per hour threshold occurred in the general area.
