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Steep slope asphalt and non-asphalt shingles are tested in accordance with UL 2218, the Standard for Impact Resistance of Prepared Roof Covering Materials. Representative underlayments are normally included in these roofing systems.
Learn what impact-resistant roofing materials are and which homeowners will benefit most from the protection they provide against hail and wind-blown debris.
Impact Resistance levels are determined by compliance to the UL 2218 Standard for Impact Resistance of Prepared Roof Covering Materials. The standard is maintained by global safety authority, Underwriters Laboratories (UL), that “…evaluates roof covering materials relative to their resistance to damage from impact (such as hail)..”.
UL 997 evaluates the wind resistance of asphalt composition prepared roof-covering materials (shingles). Materials exposed to the wind test in this standard are intended to resist damage when subjected to winds in the Beaufort Scale No. 10 range (55-63 mph).
This paper describes results from UL 2218 impact tests on 22 diferent asphalt shingle products produced by five diferent manufacturers. The UL 2218 impact test standard is a steel ball drop test to evaluate the impact resistance of prepared roof coverings.
There are many types of roofing materials to choose from, including asphalt composite shingles, metal shingles, wood shakes, and clay tile. And rather than simply going with the option you previously had, you might want to consider a longer-lasting or more modern roofing material.
Shingles on an impact-resistant roof are designed to withstand high winds and hail damage. Hailstorms are particularly hard on roofs — hailstones can form up to five inches or more in diameter, and pelt your roof at speeds of 90 miles an hour or more.