How wind-resistant are cedar shakes and shingles?
Certi-label™ shakes and shingles have been subjected to the UL 1897 fourth edition “Uplift tests for roof covering systems” with exemplary results. The classification for uplift resistance is expressed in pounds per square foot. The test method subjects a minimum 10 by 10 ft. test sample to various short term (1 minute interval) static pressures which represent the uplift forces imposed on roofing systems securement to a specified roof deck when exposed to high velocity winds. In other words it tests how well shakes and shingles hold up when subjected to high winds. It measures the degree to which the roofing material is uplifted from the roof deck.
