Sumner Roofing & Exteriors insulation products improve building energy efficiency and reduce building energy consumption for the life of the structure. As a result, they help conserve nonrenewable energy sources, decrease dependence on foreign oil and lower greenhouse gas emissions. In addition, the recycled content of the fiber glass insulation is currently 30-35% and exceeds the EPA Recovered Material Guideline for fiber glass products, consisting of pre-consumer and post-consumer glass cullet.80+million U.S. homes are more than 30 years old. Most of these homes are under-insulated. Adding attic insulation is the most effective way to improve home energy efficiency.