Q. Is it True That I Will Not Be Able to Pass a Wire through a Wall with Foam?
A. There is a common misconception propagated by fiberglass companies that a full open cell foam cavity will make snaking a wire through the wall impossible. They argue that fiberglass or a flash-and-batt system (combination of both foam and fiberglass) will allow the wire to be easily passed through. This is not entirely true. Firstly, a properly installed flash-and-batt system should not incorporate a kraft-face, so the snake will easily become entangled in the fiberglass. The snake will often pull much of the fiberglass out of the cavity like cotton candy. Whereas in an open-cell foam cavity the use of a snake drill will allow a tidy hole to be burrowed through the soft foam without much disturbance. Many electricians feel it is easier to snake a wire through open-cell foam than through fiberglass.