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Wire Fishing Tips?

 
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Old 02-02-2018, 04:38 PM   #1
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Wire Fishing Tips?


I have a fun job coming up next week, installing a boatload of recessed lighting in a basement ceiling.

The good news is, it's all LEDs in 4" remodel boxes. The bad news is, the ceiling's completely drywalled, with the joist cavities jam-packed with fiberglass insulation.

Anyone have cute tricks for getting the wires run without totally looking like a demented woodpecker wreaked havoc on the place?
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Old 02-02-2018, 05:45 PM   #2
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Re: Wire Fishing Tips?


Fiberglass fish rods with a bullnose tip.

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Old 02-02-2018, 05:49 PM   #3
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Re: Wire Fishing Tips?


I love a challenging fishing project...but I have also learned if there is a ton of it drywall repair can be cheaper.

Do you have access to one side of the joist cavities in an unfinished section?
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Old 02-02-2018, 05:58 PM   #4
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Re: Wire Fishing Tips?


Fishing parallel to the joists is a piece of cake, especially with the fiberglass push rods.

But going perpendicular to them can be a huge pain. You can get long drill bits and get through 3 joists at a time, but God knows what else you're gonna hit in the way of mechanicals (electric, plumbing, ducts, water etc).

Sometimes, you just gotta pull the ceiling down.
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Old 02-02-2018, 06:07 PM   #5
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Re: Wire Fishing Tips?


I have fiberglass rods, and no false modesty, I'm very good with them. But you know how insulation is, get your rod started just half a degree off-target and there's no way you're going to swing it to the hole in the next joist.

With empty joist cavities, I normally punch a 4" hole every other cavity, then drill the joists from each side and fish blind. I'm thinking that for this, I'll need to drill two joists at a time with my 4' flexible bit, then pull the wire with that as I retract it. Of course, major PITA with fiberglass clumping up on the drill.

If that doesn't work out, yeah, I'll probably have to just cut stripes across the ceiling. Ugh.

The entire ceiling is drywalled. No access anywhere.
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Old 02-02-2018, 06:11 PM   #6
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Re: Wire Fishing Tips?


Thanks Ken, you're helping me look forward to Monday.

Not sure I want to try 3 joists at a time, mostly because of the potential obstacles you mention.
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Old 02-02-2018, 06:12 PM   #7
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Re: Wire Fishing Tips?


Another option is if the floor above it is carpeted, pull one end of the room up and curl it back, along with the padding. Cut a strip out of the subfloor and use that to drill through the joists.

Once you're all wired up, put the subfloor back down and lay the padding and carpet back down. If need by, have a carpet layer put it back.

Much cheaper than pulling down gypboard.
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Old 02-02-2018, 06:13 PM   #8
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Re: Wire Fishing Tips?


Hardwood floors above.
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Old 02-02-2018, 06:22 PM   #9
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Re: Wire Fishing Tips?


Time to sell them carpeting.
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Old 02-02-2018, 07:08 PM   #10
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Re: Wire Fishing Tips?


Is the ceiling strapped?

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Old 02-02-2018, 07:37 PM   #11
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Re: Wire Fishing Tips?


I should be so lucky. Nope.
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Old 02-02-2018, 08:25 PM   #12
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Re: Wire Fishing Tips?


How do you know?
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Old 02-02-2018, 08:29 PM   #13
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Re: Wire Fishing Tips?


And this is why remodel electrical costs 30 times as much as new.




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Old 02-02-2018, 08:32 PM   #14
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Re: Wire Fishing Tips?


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Originally Posted by Seven-Delta-FortyOne View Post
And this is why remodel electrical costs 30 times as much as new.




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Old 02-02-2018, 10:23 PM   #15
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Re: Wire Fishing Tips?


Quote:
Originally Posted by 480sparky View Post
How do you know?
The vintage (very recent) and typical construction practices around here for that type of house. I'd be astonished--and will confess here if it turns out otherwise.

Having said that, it's been nearly a year since I did a walkthrough, so we shall see.
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Old 02-02-2018, 11:27 PM   #16
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Re: Wire Fishing Tips?


Call an electrician
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Old 02-03-2018, 12:31 AM   #17
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Re: Wire Fishing Tips?


Any decent plumber would tell you to put a 1/2" bit in your router, set to 1" depth, and route a channel with notched joists wherever you want.

Seriously, circ saw a channel. If the dust is a no go, 3-4" hole saw so you can get your hand in if you need to. Save the pieces for patching.
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Old 02-03-2018, 12:33 AM   #18
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Re: Wire Fishing Tips?


NM I presume? It's often worth a whole other roll and finding a different route than jumping joists, tearing up drywall, etc. I have cut the ceiling out in the wall/ ceiling corner, stapled the NM to the bottom of the joists and sold them a crown mold job to cover it up. Just be careful installing the crown.

Someone will be along to code bust me on this
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Old 02-03-2018, 01:19 AM   #19
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Re: Wire Fishing Tips?


Quote:
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..............Someone will be along to code bust me on this
https://www.thisoldhouse.com/how-to/...-crown-molding
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Old 02-03-2018, 02:09 AM   #20
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Re: Wire Fishing Tips?


Quote:
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I'd seen that before but I used regular crown. We used to cut a channel out in plaster in old homes with 7" base and then re installing the base being careful of course not to puncture the NM....... Meg. Meg.

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