This standardized test is known as the underwriters laboratory 2218 ul 2218 and is also nicknamed the steel ball test based on the results of this test ul assigns one of four ratings to a shingle with class 4 being the highest possible rating.
Impact resistant ul 2218 standard roofing material.
The test evaluates the effect of impact from the steel ball at locations on the assembly selected to be most vulnerable such as but not limited to edges corners unsupported sections and joints.
Ul certified to meet astm d3462.
Reaffirmation and continuance of the second edition of the standard for safety for impact resistance of prepared roof covering materials ul 2218 as an american national standard.
Back in the mid 1990s after a series of catastrophic hail storms across the u s the roofing industry developed a test to evaluate their products resistance to impact.
Conforms to csa standard a123 5.
Ul class 1 2 3 and 4 tx only ul and fm class 3 and 4 all other states.
Approved laboratory roof class location.
Ul 2218 class 4 rating.
Ul class a fire resistance.
The following is being proposed.
A class 4 rating is the toughest.
As you contact various contractors or suppliers you should ask about roofing materials that meet ul standard 2218.
The ul 2218 classification set a standard for roof impact resistance whereby materials were rated on their resistance to impacts with steel balls simulating 90 mph hailstones of various sizes.
Miami dade product control acceptance.
Class 4 roof covering is the most impact resistant roof and receives the highest premium discount.
Roof coverings that have passed the ul standard 2218 test are classified by ul as either class 1 2 3 or 4.
Impact resistance testing for the evaluation of low slope roofing systems are covered under ul 2218a impact resistance of roofing systems.
A class 4 roof covering receives the highest premium credit.
The industry guideline ul 2218 exists to test a metal panel s resistance to puncturing or failing when it comes into contact with items such as hail or other small debris.
The list of approved laboratories is shown below.
Roof coverings that have passed the ul standard 2218 test are classified as either class 1 2 3 or 4.
Ul 2218 standard for impact resistance of prepared roof covering materials.
