Which way does rigid foam insulation face?
i will be using the cut & cobble method to insulate our rim joints in a zone 5 house. Just a couple final questions…
1. EPS or Polyiso?
(ive read that in cold temps EPS retains it’s R-value better.)
2. i will prob. be using Tuff-R or Super Tuff-R and i get conflicting info as to which face of the boards should should face inward. it seems to depend on the situation.
(and getting any info from the company is impossible)
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