talking insulation: spray-in polyu vs polyisocyanurate sheet

69 Avion wrote:
I wonder how Avion was so successful with the spray in foam all those years.

I have no clue...did Avion use polyurethane spray in foam? Did they use a thermal/fire barrier on the interior between the foam and the inside?


I do see that S&S Campers uses Thermax....that could be a vote for that route as I have heard they are a quality builder.

http://www.s-scampers.com/ponderosa.php

I could still be convinced of the spray in, as it would be easier. I would want the answers of fire saftey first though.