Routing wiring through rigid insulation
I invite recommendations for routing the wiring for lights and ceiling fans up through 2×6 t&g exposed roof decking and into the rigid insulations panels. I envision somethhing like routing a channel with a hand held and possibly battery operated router.
Thanks for any tips
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I read once somewhere about a way to put a chase through rigid foam. The author was describing a way that if you stand the panel up on edge, plumb it to make sure it is perfectly vertical, and then heat a steel ball bearing up until it is red hot, and drop it on top of the panel. He claimed it would burn it's way through the panel in a nice, straight line. I have NEVER tried this, due to the smole from burning rigid insulation is nothing to joke about. (polyiso foam burning makes something similar to nerve gas).
With that said, I think a router bit may get hot enough to make the stuff smoke too. I also would check if you can run wires with no clearance against foam. I have had good luck cutting the stuff with an old hand saw.
"...and then heat a steel ball bearing up until it is red hot, and drop it on top of the panel."I saw that on TV, on the Green building channel. They were building a house with SIPs and had to run a hole not among those from the factory. They heated the ball with a torch and dropped it on the top edge. After a minute or so, it plopped out the bottom edge.
I have seen a lot of things on TV. . . It still doesn't mean I am going to try it. I am a little suprised that burning styrofoam made it onto the "green building" channel.