The sheets of high density rigid foam are blue to show they are for temp control and not for other uses. Kinda like the 'pink' glass -
Spraying on a coat and expecting it to foam out and then freeze perfectly is a risky trick. I see it done on wood buildings and they use large saws to saw across the face of the studs.
When you have a sheet of stuff that you cut to fit and then hold it in place - It is a finished product and provides the standard spec of protection.
Check the local home builder type place and see what they have.
I live in deep East Texas and it gets hot here also. RH in the 80-90 often with flow off he Gulf and a hot sun.
Martin Martin H. Eastburn @ home at Lions' Lair with our computer lionslair at consolidated dot net TSRA, Life; NRA LOH & Endowment Member, Golden Eagle, Patriot"s Medal. NRA Second Amendment Task Force Charter Founder IHMSA and NRA Metallic Silhouette maker & member.
buffalo wrote: