Mark P Posted April 19, 2011 Report Share Posted April 19, 2011 I'm wondering if the a date can be obtained from these numbers on an EPDM roof covering? If not a date do they tell us anything useful? Click to Enlarge 22.58 KB Link to comment Share on other sites More sharing options...
Bill Kibbel Posted April 19, 2011 Report Share Posted April 19, 2011 Probably a lot/run number. I wouldn't know if there is a date code in there. One EPDM manufacturer prints if it's either 30 to 60 mils in thickness. Link to comment Share on other sites More sharing options...
Jim Morrison Posted April 20, 2011 Report Share Posted April 20, 2011 I typically only ever see (mostly) 60ml or 90ml. I might have seen a 45ml roof once. I don't know what the other numbers mean. Link to comment Share on other sites More sharing options...
charlieb Posted April 20, 2011 Report Share Posted April 20, 2011 Different mind set. I typically see 45 mil. I hunt for the stamp with the manufacturer's name and call them to date the material. Typically it's encrypted. I typically see Carlisle products and occasionally a Firestone roof. Link to comment Share on other sites More sharing options...
Rob Amaral Posted April 20, 2011 Report Share Posted April 20, 2011 I see 45 every so often.. that might be circa 1998.. ? Link to comment Share on other sites More sharing options...
BornaRoofer Posted May 17, 2011 Report Share Posted May 17, 2011 1998 Link to comment Share on other sites More sharing options...
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