HEY OUT THERE————-I WANT TO INSULATE THE EXTERIOR WALLS OF MY HOME . I DON`T WANT TO TEAR UP THE INSIDE. I HAVE BRICK EXTERIOR, MAYBE SOME TYPE OF FOAM THAT CAN BE INSTALLED FROM THE EXTERIOR, BUT, EXPANDING TYPE COULD CAUSE A PROBLEM IF IT EXPANDS TO MUCH AND PUSHES THE BRICK OVER. THANKS