Where do you get *very* long drill bits for drilling from a door or window through the wall and up into the attic?
The kind I have seen have a narrow 5 ft. long rod welded to a regular drill bit, then there is a hole drilled through the end of the bit and at the end of the rod. Then when you have drilled a hole through to the attic, you can thread a wire through the end of the drill bit, then pull the wire back out through the hole you just drilled.