Large-scale flooring contractors often sell their "tear-out" padding to these brokers in massive 800lb bales.
The primary buyers are companies that collect post-consumer foam and process it into (the multicolored foam often found under residential carpets).
Check platforms like Craigslist or Facebook Marketplace , where installers often list leftover rolls for "quick cash". Where to buy carpet padding cheap! Carpettoolz.com
These recyclers often pay by the pound (typically $0.05 to $0.15 per lb ) for clean, dry padding.