On New Years Day, storm clouds gathered while the temperature dropped...
I've been doing some work on the place myself for a change: putting in conduit to hold "communications" wiring. It would be simpler to run Category 6 wires (AKA "Ethernet cables" - what you use for computer networks) instead of conduit. But my boss Jim pointed out that the world of computer and home systems electronics is changing so quickly; he wished his house had conduit that would allow him to pull new wires as things evolve. Makes sense to me!
To put my conduit into the downstairs ICF wall, I first use a heat gun (which closely resembles a soldering iron) to melt through the 2.5" thick stryrofoam...
Then I break out the foam to create a channel (that's the grey concrete showing through in the back) ...
Shown below are what the electrical and plumbing cut-in's look like. You can see that where the wire crosses the plastic stud it is protected with a metal plate to avoid having sheetrock screws pierce it later. You can see they use a bit of foam-in-a-can to keep the wires in place.
I think we'll go back and fill all these channels with more foam before sheetrocking in order to restore the insulation value.