Sources: Sika Corp., Lyndhurst, N.J.; CP staff Eyeing code-level foundation insulating performance in a 1.5-in. thick board, the Rmax division of Sika Corp. has turned to a durable, water-resistant facer on a core of polyiso, a closed-cell material widely adopted for high thermal resistance in exterior continuous wall and roofing applications. “Historically, the vast majority of the below-grade commercial and…
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