Mark P Posted April 19, 2011 Report 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
Bill Kibbel Posted April 19, 2011 Report 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.
Jim Morrison Posted April 20, 2011 Report 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.
charlieb Posted April 20, 2011 Report 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.
Rob Amaral Posted April 20, 2011 Report Posted April 20, 2011 I see 45 every so often.. that might be circa 1998.. ?
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