It’s polyiso with fiberglass coated paper on each side. I don’t want to cut off the fiberglass coating to make them flush and lose some of the r value. Once the aluminum panels are up and the glue is dry I’ll attach the interior paneling with screws To sandwich the insulation in. If It looks like it’s gonna deform the paneling I’ll install thin furring strips to the interior walls first. I’m using Sikaflex to bond the panels to the frame and vhb tape at the panel to panel connections.
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