Are asphalt roof shingles biodegradable? In most cases 11% In some cases 16% Never 50% Not sure 22% Get Free Quotes Today! Question: Are asphalt roof shingles biodegradable? Top Answer (50% of 18 votes): Never. Answer: Never Explanation: It's asphalt it doesn't degrade Srp inc. Answer: Never Explanation: Asphalt does not degrade underground. JPS-WNC llc Answer: Never Explanation: They are not HAMMER & SONS CONSTRUCTION Get Free Quotes From Local Pros ProMatcher Get Free Quotes Today! Find Local Pros Free Asphalt Shingle Roof Installation Cost Estimates Related Questions How Much Does a New Shingle Roof Cost? How Much Does a New Asphalt Roof Cost? Are Asphalt Shingles Considered Hazardous Waste?Top answer: No Should I use asphalt shingle roof nail caps?Top answer: Always Can Moss Damage an Asphalt Shingle Roof?Top answer: In most cases