| Auralex
RC8 Resilient Channel
Auralex RC8
resilient channel is a specially-formed, sturdy metal device that, when
used to hang drywall (instead of just attaching the drywall directly to
the studs or joists), GREATLY improves the sound transmission characteristics
of the wall or ceiling system. Auralex RC8 Resilient Channel adds 1/2"
of airspace between the studs and drywall and can provide as much as 10
dB of isolation if used properly.
RC8 should
be installed horizontally at the bottom and top of your wall, then every
2' or less in between. Up to (2) layers of 5/8" drywall and a layer
of SheetBlok may be hung on RC8, even on a
ceiling.
Size:
8' long per piece
Qty: 24 pieces per box
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| This
rendering shows how the RC8 resilient channel is mounted to a wall
stud. Note that the channel is attached at the lower contact point
and lips out and up. |
RC-8
resilient channel is installed on the walls and ceiling and is ready
for a drywall / Sheetblok / drywall sandwich. |
Installation
Tips
- Position
RC-8 Resilient Channel at right angles to steel studs, space 24"
o.c. and attach to stud flanges with 3/8" Type S pan head screws
driven through holes in channel mounting flange.
- Use 1-¼"
Type W screws to mount the RC-8 to wood studs/joists/framing.
- Locate
channels 2" from floor and within 6" of ceiling.
- Install
channels with mounting flange down (see picture below), except at floor
to accommodate attachment.

- Splice
channel by nesting (not butting) directly over stud. Screw-attach through
both flanges.
- A 2-hr.
floor/ceiling system with STC/MTC ratings as high as 60/54 is achievable
with a ceiling of double-layer 5/8" gypsum board attached to RC-8
channels across joists with 3" Mineral Fiber
Insulation in the joist cavities.
RC
Comparison Table (PDF) contains a table of wall constructions
with their 1/3 octave band Transmission Loss values, STCs and (when available)
MTCs measured in accordance with ASTM E413. The table is intended for
use in comparing wall systems before and after the addition of resilient
channel. It is not intended to be a complete partition STC/MTC resource.
For information on other partitions, please see the source references
in the document.
Related
Items:
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