I am getting ready to apply a new elastomeric roof coating on top of the existing asphalt membrane.
Instruction says to thoroughly clean and let dry before application. The problem is the asphalt membrane has a lot of "loose" particles the size of sand. I think it's part of the asphalt that is coming loose? I am unable to clean them off totally. I can brush and brush and brush and more come out and it seems to never end.
Any suggestions? May be I should just apply it as-is?
Thanks,
MC