Build sustainably with JM commercial insulation. Improves the indoor air quality in your building. Johns Manville offers the most complete line of building insulations that improve indoor air quality because it's made without formaldehyde. Makes your structure more sustainable because of high recycled content. JM commercial insulations are made with an average of 25 percent recycled glass - including at least 20 percent certifi ed post-consumer recycled bottle glass and the balance post-industrial recycled glass. Contributes toward a variety of LEED® credits.