Routing cables to cold attic

[Botdog]

Implementation of network cable to attic. As seen, two cables I pulled through 10 years ago. Now I want to pull a whole bunch and also prepare for more, a total of about 20, so a bundle (but regular Cat 6 cable, so not massive things directly).

How best to make a passage that allows for practical cable pulling now, and pulling more later, and also achieve a proper moisture barrier? So far I have thought of maybe a piece of plastic pipe cut long enough to just pass through the ceiling and thus end "under" the insulation in the attic, pulling the cables through the insulation and up to the rafters for suspension. Then plug with insulation and moisture barrier around the cables in the pipe passage...? Reasonable? Anyone have tips on a moisture barrier piece that can be stuck in place? I remember there being solutions for sealing around cable penetrations but haven't found any when I've looked.

Thanks!

 

[largab]

I would have run the pipe completely through the insulation. "Sealed" the pipe inside with foam rubber or other insulation that is easy to dismantle. Letting the pipe terminate in the insulation is just asking for trouble.

 

[Botdog]

I would have run the pipe completely through the insulation. "Sealed" the pipe inside with foam rubber or other insulation that can be easily dismantled. Letting the pipe terminate in the insulation is asking for trouble.

Hmm, maybe? The reason for my original thought was that I previously heard that you should not run pipes/hoses from warm to cold as it can cause condensation - but possibly if you seal the pipe (properly) so that the warm air can't rise? What problems do you think could arise (honest question, trying to learn more )?

 

[largab]

If warm moist air leaks into insulation and condenses there, it is difficult to detect. If you have mechanical ventilation, the risk is minimal (you should have a little negative pressure in the house).

 

[Botdog]

If warm moist air leaks into insulation where it condenses, it's hard to detect. If you have mechanical ventilation, the risk is minimal (you should have slight negative pressure in the house).

Hm, good consideration - I'm familiar with the moisture/condensation issue, but I hadn't thought about the aspect of negative pressure before... in other words, it might be lucky that I'm working specifically in the utility room - I have an exhaust air heat pump and extraction in the same utility room, so there's slight negative pressure just there. Thanks for the tip.