Crazy entry 
 There is little information that is useful or accurate in the original entry or the subsequent comments.  It confuses cottom rag felt with paper, coar tar with asphalt, steep sloped roofing underlayments with base layers of a built-up asphalt roofing systems and waterproofing with roof ventilation and synthetic roofing underlayments with synthetic siding underlayments.  It should be deleted in its entirety. ````