Impermeable covers can be used to reduce odors and emissions from manure storage or to capture biogas for heat or power generation. Impermeable covers are placed on manure storage structures to create a physical barrier that prevents the transfer of volatile chemical compounds from the manure storage headspace to the atmosphere.

This fact sheet is part of the Air Management Practices Assessment Tool (AMPAT) developed at Iowa State University and funded by the National Pork Board. Additional resources can be found on the AMPAT web site.