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Building Enclosure
JM Spider now achieves R-24 in 2×6 wall cavity

July 29, 2014 - Johns Manville (JM), a building products manufacturer, says its signature JM Spider spray-in custom fibre glass insulation has received Canadian Construction Materials Centre approval (CCMC 13212-R) for a thermal resistance of R-24 in a 2x6 wall cavity, complying with 2010 National Building Codes. The product previously offered a thermal resistance up to R-23 in a 2x6 wall cavity. Boasting superior thermal performance, JM Spider promises to fill framing cavities in wall and overhead applications in both wood and steel framing without leaving gaps and voids.