Underwriters Laboratories Impact Resistant Roof

January 25 2010 ansi approved.

Underwriters laboratories impact resistant roof. With a regular shingle most of our competitors impact resistant shingles are only class 3 cracks and ruptures will appear from that kind of impact. As you contact various contractors or suppliers you should ask about roofing materials that meet ul standard 2218. Roof coverings that have passed the ul standard 2218 test are classified as either class 1 2 3 or 4. Ul standard ul 2218 edition 2 impact resistance of prepared roof covering materials edition date.

Class 4 impact resistant roofing shingles. How are impact resistant roofs classified. Roof coverings must be tested and approved by underwriters laboratories ul or factory mutual fm and be rated as a class 1 2 3 or 4. This test is called the ul 2218 impact rating.

Discount names percentages availability and eligibility may vary by state. Return to reference 2 for qualifying metal products an exclusion of certain damages to. Our testing services assess compliance to the following ul and industry standards. The list of approved laboratories is shown below.

Return to reference 1 underwriters laboratories impact resistance of prepared roof covering materials or fm global specification test standard for impact resistant testing of rigid roofing materials by impacting with freezer balls. Ul developed a test to rate the strength of roofing materials. Spread of flame ul 790 burning brand testing ul 790 impact test ul 2218 intermittent flame testing ul 790 solar reflectance thermal emittance coating thickness astm c1549 and c1371 wind resistance astm d3161 wind uplift ul 1897 10x10 and 12x24 deck. These tests are widely accepted by the roofing industry and the results are widely quoted in industry promotional materials.

Impact tested to prevent cracks and tears. They are associated with the ul 2218 impact test which involves dropping a two inch steel ball from 20 feet high onto the shingle and examining whether the shingle cracks or not. In a class 4 ul 2218 impact resistance test a 2 inch steel ball is dropped from 20 feet to see if the shingles will fracture. Class 4 roof covering is the most impact resistant roof and receives the highest premium discount.

What are hail ratings impact resistance ratings. Storms that bring hail airborne debris and high winds put your roof at risk for damage and installing impact resistant shingles may. Ul provides the knowledge and expertise to help consumers make informed decisions on products that affect their daily lives. When the backing on a shingle breaks it creates an entry point for water to potentially make its way to your underlayment decking and even into your home.

A class 4 roof covering receives the highest premium credit.