For FCBs made without additive (10 AA00 = 0.720 W/m K), thesimulated Ueqof the wall was found to be Ueq= 0.715 W/m2K, andfor FCBs made by adding 17% of SMC (10 AAC17 = 0.550 W/m K)and Ueq= 0.645 W/m2K was obtained. This represents a 9.8%improvement in the equivalent thermal transmittance of the wall