Icynene-Lapolla recently introduced Foam-Lok 450 Spray Polyurethane Foam Insulation, an open-cell spray-foam insulation that can be left exposed in attics, crawlspaces, and interior spaces without the application of an additional ignition barrier. According to the manufacturer, this new foam adheres tenaciously to framing members and substrates, maintaining its effectiveness as an air barrier for the life of the building. Icynene-Lapolla also claims Foam-Lok 450 can fill a 2x6 wall cavity in a single pass. Pricing varies by project. lapolla.com

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