  鲜花( 11)   鸡蛋( 0)  
 | 
 本帖最后由 vieri 于 2014-1-19 12:26 编辑 ! I+ D5 v0 [. \; P6 Q 
 
& X3 L- L' d7 S" u1 fSpray foam should have a higher averaged R value per inch thickness compared to regular batt insulation, and last longer. If you want the same R value, you need less thick spray foam than regular batt insulation. To compare the cost, you have to know how much R is required as per code, and calculate the required thickness and then calculate the price difference, this is my understanding, anyway, "the required R value as per code affects the insulation thickness, and the insulation thickness affects the price", hope this helps,  |   
 
 
 
 |