Labels:sky | trade name OCR: Without tud In summary there isa small amount of thermal ine fficiency but there is also signi ficant difference Notice slide (and 52) that the was accomplished with foam sheathing. But with two inches foam sheathing in slide 58 (and 54 we have not gotten back to the original R-value over More foam still results r lower R-value There are some advantages to using all foam however there are some disadvant tages. You have to use lot of foam: or inches of foam. That requires the brick ledges larger because they must pro iect further away from the wall allow for the thicker foam. this means adped steel, added eccentricity on the steel, so may be has to heavier steel window flashings and ledges have to larger. There is trade off using fiberg plass and foam There is per formance trade off and det ...
