For a new build I need to run network and surveillance cables up a low voltage wiring shaft into the attic and then out to the destination.
Of course the wiring shaft needs to be sealed at the top for fire code.
I was thinking that sealing the shaft with plywood and installing pass through couplers through the plywood would be a great way to do this. Never did like rework-ability of spray foam. This is my house so the incremental higher cost won't be an issue.
I'm a little concerned about losing some signal integrity through the use of them though.
Anyone ever done this before?