R value / Discussions

...r an air barrier as well as vapor barrier/vapor retarder, see here the difference between air barriers and vapor barriers. The sustainability of sheep's wool insulation makes it a premium choice for eco-renovators who want a renewable, biodegradable, and high-performance material.  

...red to have an R value of 5.5 per inch in warm climates, and about R 5 per inch in colder climates. If I’m right about where you live then you’re probably in the middle of that. So the thermal performance isn’t terrible, but there is another concern, which is also addressed in the article linked above. Polyiso rigid in...