I'm about to hang one of the LED big screen TVs on my wall. To tidyit up I decided to run the cables through the wall. When I cut a holein the wall I discovered it was filled with insulation. It's aninside wall. The master bath is on the other side of the wall. Whyis an inside wall insulated?

Minimal amount of noise reduction--

wrote in news: Guess a bunch of old wive's were running the studio! :-)

Why Insulation in Inside Wall?

Oct 08, 2008 45 Replies

Rate this thread:

Pete C. 17 years ago

If it's normal kraft faced batts, you should be able to push your snake up between the insulation's kraft paper face and the back face of the drywall. I don't know how big a hole you have down there now, you may need a hole big enough to get a few fingers in in order to feel and find the space between the paper and drywall. If the kraft paper is on the other face (this was an interior wall, right?) a hole the size of a single gang electrical box should let you get your hand in to get the snake over to that side. As for other wire to fish with, go to Depot / Lowe's and get a couple of the long steel hanger wires used for suspended ceilings.

Vote

Red Green 17 years ago

snipped-for-privacy@dog.com wrote in news: snipped-for-privacy@4ax.com:

Guess a bunch of old wive's were running the studio! :-)

Vote

Ron 17 years ago

I agree with another poster, use your plumbers snake and go from top to bottom. I see no reason why it wouldn't work.

You said you didn't want a hole in the wall if it doesn't work, well wouldn't the TV cover it?

Plus, if you cut out a nice square piece of drywall it's very easy to very easy to repair the hole with the piece that you cut out.

Vote

Mikepier 17 years ago

Hard to tell in your picture, but can you break down exactly what cables you are running and for what device? It looks like I see an f-fitting, an HDMI (?) and component cables, the other cables not sure about.

Vote

bud-- 17 years ago

I had remembered insulation was fairly effective, but apparently not.

formatting link

=93sound transmission class=94 numbers for different wall constructions. Insulation adds, but not a lot (like you said).

formatting link

more information on STC and says it is "roughly the decibel reduction in noise a partition can provide".

A local university hospital used 5/8 rock on 3.5" metal studs with insulation between patient rooms (might have been double 5/8 rock each side). But they were real strict on penetrations. Electrical boxes had to be in different stud partitions. Doors had seals on all 4 sides. Cracks are a major flaw in isolation.

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D I agree with whoever said you want to fish between the insulation and drywall, not thorough the insulation.

-- bud--

Vote

clare at snyder dot ontario do 17 years ago

Fibreglass insulation is medeocre at best for sound proofing, but rock wool is quite effective (also known as mineral wool or spun slag)

** Posted from

formatting link

Vote

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required