Atlas double foil faced rigid foam board (DFFRFB) is a closed cell polyisocyanurate (polyiso) foam core, faced with a reflective foil facer on the front and a non-reflective, red acrylic-coated facer on the back.
With an R-value of 7 per inch, Rigid foam board is the perfect choice for insulating walls and the rim joist.
Rigid foam board can also be air sealed with spray foam.
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