Thanks for the correction on R-value and we certainly agree on where to attack air sealing first. At colder temps, Tripolymer's R value goes up. Am I right that the R value for fiberglass goes down at lower temps?
"The Tripolymer wall foam insulation that I have used would be a good fit for this application. It is a phenolic-resin base that goes in like shaving cream. There are no issues with toxicity. It does expand upon installation -…"
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