Thought I would post this answer from a friend I got in email. Not sure if this fellow used the same injection foam or spray kind. From what I have seen and read he used the spray kind as I don't think you can snake wires thru the injection kind. I believe it to be too thick and hardened for that.
Anyone know?
"Not a problem my partner (name deleted) has foam insulation in his walls and says that you just fish it through the same as fiberglass insulation. He has done it twice for new circuits and speaker wire. He also pointed out that if you are rewiring. You use the old wires as the pull for the new ones. The insulation is soft and not hard to pull through. Hope this helps. He said any electrician worth a damn could do it if he can."
Oletimer.
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