Stopping Air Infiltration at Cable / Phone Line Entry

This is an entry point for cable TV coax, phone lines and a couple of grounds. They exit the basement of this home through a hole drilled in the foundation.

The air infiltration at this opening is significant. There is effectively a open path to the outside between every cable. If you flex the cables a bit you can see sunlight.

 

I'm struggling with how to stop the airflow. My first thought was expanding foam but that could be a mess and not guarantee that the leaks would be filled.

 

I searched the web but mainly came up with industrial products for outdoor utility boxees.

Any suggestions?

 

Thanks for your help,

 

Johnny

 

Johnny on Energy - Helping you improve your home energy efficiency.

Views: 310

Reply to This

Replies to This Discussion

Gosh, that's a lot of wires.  If there weren't quite so many, I'd suggest making a foam gasket so that each wire passed through its own hole.

 

How about if you attached a zip tie to the bundle of wires on one side of the wall to immobilize them, and then on the opposite side peeled the wires apart one at a time and injected caulk between them, then bundled them back together (squishing the caulk) and zip tied that end?  That would seal all the gaps between wires, leaving you with only the outside of the bundle to seal.  Of course, getting any wires in or out after that would be nearly impossible.

 

Looking forward to hearing other people's suggestions.

With access like that, I'd try pushing into gaps appropriate lengths of wooden dowel of various diameters, to function like shims and fill those gaps.  Clean and reversible.  If it doesn't work, pull them out and try another's suggestion.

RSS

Latest Activity

Franco Oyuela commented on John White's blog post 6 Most Common HVAC Duct Problems You Should Know About
"When Duct Issues Affect the HVAC System as a Whole https://www.minisplitheat.com/ •…"
8 hours ago
Franco Oyuela commented on Building Performance Institute's blog post How Your Connected Technology Gets Connected
"Reasons to Install a Smart Thermostat. https://www.cooling-heating.org/ Saving Money on Energy…"
8 hours ago
Franco Oyuela commented on John White's blog post Top 5 Reasons to Install a Smart Thermostat
"Reasons to Install a Smart Thermostat. Compatibility with Other Smart Devices. Smart device…"
8 hours ago
Diane Chojnowski posted a discussion

Interested in presenting at 2020 National Home Performance Conference?

Now Accepting Proposals to Present at the 2020 National Home Performance ConferenceThe 2020…See More
11 hours ago
John White posted a blog post

Top 5 Reasons to Install a Smart Thermostat

Smart thermostats do not just control panels for your air conditioning and heating systems. They…See More
19 hours ago
Daniel Cullen liked David Byrnes's blog post Why Phoenix Is Called "The Land Of No Return"
yesterday
Tyson Pischel commented on David Byrnes's blog post Why Phoenix Is Called "The Land Of No Return"
"Couple of thoughts. Building in the size range of 1,800-2,000 sq ft, we have one return in the main…"
yesterday
Profile IconChris Dowis, Tyson Pischel, Megan Tunon and 1 more joined Home Energy Pros Forum
yesterday

© 2019   Created by Building Performance Association   Powered by

Badges  |  Report an Issue  |  Terms of Service