asphalt and asphalt treated with an antimicrobial compound as utilized in separate embodiments the paper facings were tested using astm methods d 2020a and g 21 96 after 7 days the paper facing of example 2 containing standard asphalt had no growth on either the paper substrate and or the asphalt as measured according to both the d 2020a and g 21 96 tests after 14 days the paper facing of example 2 containing standard asphalt had no growth on the paper substrate according to the d 2020a test but had heavy growth on the asphalt according to this test after 14 days the paper facing of example 2 containing standard asphalt had slight growth according to the g 21 96 test after 21 days the paper facing of example 2 containing standard asphalt had moderate growth according to the g 21 96 test after 28 days the paper facing of example 2 containing standard asphalt had heavy growth according to the g 21 96 test after 7 days the paper facing of example 2 containing the treated asphalt had no growth on either the paper substrate and or the asphalt as measured according to both the d 2020a and g 21 96 tests after 14 days the paper facing of example 2 containing treated asphalt had no growth on the paper substrate nor the asphalt according to the d 2020a test after 14 days the paper facing of example 2 containing treated asphalt had no growth according to the g 21 96 test after 21 days the paper facing of example 2 containing treated asphalt had slight growth according to the g 21 96 test after 28 days the paper facing of example 2.