Underwriters Laboratories INC.

     
       Underwriters Laboratories Inc. (UL) is an independent, non-profit product testing, certification and standards development organization that has been involved in the roofing industry since 1903. UL is not part of or financed by the federal government. Manufacturers voluntarily chose to have their products submitted for testing and safety performance certification. Recognized initially for testing of electrical products, UL soon responded to a call for safety testing on other product types. There are currently some 18000 types of products UL evaluates. UL is the most universally recognized and respected testing agency for such services around the world.

       Many municipalities' codes, laws and regulations insist that roofing products and roof systems be tested, listed and/or certified and labeled by a national organization before the products can be used or installed in their jurisdiction. UL testing of roof systems normally encompasses the following test standards:

          UL 790-  Fire Resistance (three separate tests)
                           Spread of flame
                           Intermittent spread of flame
                           Burning brand
          UL2218- Impact Resistance (click here for more details of test)
          UL 970-  Wind Resistance.

      
       "Tested by UL" does not necessarily mean the product has been "certified by UL". UL certified and labeled products have not only been evaluated/tested and found to be in compliance with UL testing requirements but are manufactured under UL's ongoing Follow-Up Service Program. This Follow-Up Service Program entails periodic inspection of manufacturing facilities and quality control procedures by UL field representatives, and examination and/or testing of product samples from the factory, the open market, or elsewhere. This third party control of product quality is assurance of ongoing attention to performance specifications as defined in the UL testing protocol. This means much more than just "UL tested" which merely indicates a given sample tested on a given day passed UL test requirements.

       UL "certifies" and "lists" products as meeting their testing requirements, but they do not "approve" products. Product approval is the prerogative of the appropriate authority having jurisdiction over the product installation. 
 

Ce·DUR AT Underwriters Laboratories INC.

      
       ENDUR-ALL began testing of Ce·DUR Shakes at UL's lab in Northbrook, Illinois in 1996 and received listing and certification for Ce·DUR Shakes in 1997. UL was chosen over one of the many independent test labs in the US because the UL label:

      Ce·DUR Shakes are currently listed or classified by UL under report number R18322 in UL Categories TFXX "Prepared Roof Covering Materials" and TGAM "Roof Covering Materials- Impact Resistance" as follows:

Fire:
Wind:
Impact:

       ●  For more detailed Ce·DUR Shakes listing information or specifics on UL test procedures, contact us.