Insulation Installation Guide: FOAMULAR® XPS Insulation for Exterior Wall Cavity

Installing Owens Corning FOAMULAR® XPS insulation in exterior walls provides a higher R-value per inch than standard insulation alone and reduces the potential for condensation. This video reviews the materials, tools and safety gear you will need to install insulation in an exterior wall cavity. Learn how to measure accurately and the preferred method of applying adhesive on insulation boards.
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[@thebigdoghimself]

Could you just fill the entire cavity with the foamular board? Should you fill in that small gap at the sides with expanding foam sealant?