Morning, My 15 yr old son has discovered the fun of chickens and wants to try his hand at making his own bator - mom will stick with her sportsman 'bator , thank-you-very-much. He's toying with the idea/wants to use insulated foam panels used for home building to make a good sized box he would secure together in a rectangle shape. It's that blue (or pink) sheeting stuff thats 2" thick. I think it would be strong enough, and it would definitielty hold the heat/humidity but don't know if there are any gases that come off it when used in this manner that he should be worried about killing off the eggs? does this make sense??!!
I would think it would be just fine since they are used in home attics that get a LOT hotter than 100 degrees.