I snuck out for lunch - rare moment of sun today, but didn't have time to post this. According to my digital thermometer, it was 77.2 degrees outside, light breeze, maybe 3 mph (my guess).
I have two "coops". The first (mistakes were made), my metal roof measured 84.1 degrees in physical...
^^^ beat me to it.
When residential housing uses rigid metal foam under a metal roof, it works like this (from bottom up):
Trusses/Rafters
3/4" Plywood/OSB Decking
Moisture Barrier (usually peel/stick)
Rigid Foam
Purlins
Metal Roofing
For a hen house, that's overkill. Several $ per square...