Cellulose installation should meet ASTM C-739. Extruded polystyrene should meet ASTM C578, C518 and C272. Fiberglass insulation should meet ASTM D5359-93, C764, C665, C553, C547 and rock wool ASTM C764, C553, C547, Type 1 Category 1. Polyisocyanurate should meet Faced, Rigid Cellular ASTM 1289. In almost all cases, recycled content insulation will be cost competitive with insulation made from virgin materials.
Recycling is already an integral part of the insulation product market.
This well established industry shows that recycling is where the business and environmental communities meet by creating recycling and manufacturing jobs and protecting the environment. It is incumbent on the user to specify recycled content. The manufacturer should be contacted to determine whether a thermal warranty is offered and, if so, to obtain the details pertaining to the thermal warranty. Not all insulation has recycled content. Check with the supplier and order from knowledgeable suppliers who are familiar with recycled content product lines.