The 4x8 sheet of foam are used for lathing and insulating houses. Is far is thickness you can get it up to a few feet thick if you want to order it. Are rabbit barn is cover with 2 inch thick foam and why we really don't have cold winter are summer are in the 100 and with a cool blowing it stay in the 80's or lower. Last week it was 114 here and you could feel the differences in temperature when you walked in the rabbit barn. G&S