As far as house fire goes the furniture and carpet got to be bad also. The walls in my house are 8'' thick foam with sheet rock over it. And the 30X30 room add-on is 10'' thick foam with chicken wire and 1'' of stucco. If and when the power goes out (or state of emergency)I wouldn't worry to much about what things look like I'd be wanting to conserve wood as much as possible and no glass will ever equal the R's of a wall. So I was wondering when I posted this what people up north like Iowa ( I read was -29 with wind chills 40 something below) were doing besides running the heck out of their wood supply.