Difference between Climate Zone 5 and 4 Marine
We are working on a 5 story wood framing over concrete podium senior living facility in Thornton, Illinois. I am trying to understand the difference between Climate Zone 5 and Zone 4 Marine.
Looking at the Blog Post on this website, "Calculating the Minimum Thickness of Rigid Foam Sheathing", the table on the second page lists the recommendations for Foam Sheathing Thickness, and there is a considerable difference between the Climate Zone 4 Marine, and Climate Zone 5? But, each map I have looked at shows that Cook County, Illinois is both/the zones are the same?
Any feedback would be great.
Posted Jul 1, 2014 10:44 AM ET
Other Questions in Energy efficiency and durability