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Material Specifications

Complete material library for Mediaverse acoustic construction. All products specified in SSOT.

Insulation

Product	Density	Thickness	Use
Rockwool RWA45	45 kg/m3	50mm	Cavity fill, treatment panels
Rockwool RW3	60 kg/m3	100mm	Buffer wall cavity
Rockwool RWA45	45 kg/m3	150mm	Bass trap cores — 150mm depth required for absorption below 125 Hz

Gypsum Board

Product	Thickness	Density	Use
Knauf Soundshield Plus	15mm	12.5 kg/m2	All acoustic walls
Knauf Standard	12.5mm	8.5 kg/m2	Non-critical faces only

Sealants

Product	Use
Green Glue Noiseproofing Compound	Between gypsum layers (constrained layer damping)
Tremco Acoustical Sealant	Perimeter sealing, penetrations, joints
Tremco Fyre-Sil	Fire-rated penetration sealing — all conduit, duct, and cable penetrations through acoustic walls. 25mm depth minimum both sides.

Flooring

Product	Specification	Use
Sylomer SR 28	28 kg/m3 polyurethane	Float floor isolation pads
18mm tongue-and-groove plywood	2 layers, staggered joints	Float floor deck

Ceiling Tiles

Product	NRC	Fire Rating	Use
Rockfon Sonar E 600x600mm	0.9	A1 non-combustible	VO Live, Control Room, Video Studio
Armstrong Ultima+ 600x600mm	0.7	Class A	Editing — standard office-grade

Ceiling Grid

Product	Type	Specification
Armstrong Prelude 24mm exposed T-grid	main_runner	Heavy-duty for studio use, 1200mm centers, hung with 12-gauge galvanized wire
Armstrong Prelude cross tee 600mm	cross_tee	Snap into main runners at 600mm intervals
Wall angle / perimeter trim	perimeter	Install level at 2.75m from finished floor — this defines acoustic ceiling height

Above-Tile Insulation

Product	Use	Installation
Rockwool ProRox SL 930 (100mm)	Laid on top of all ceiling tiles — prevents flanking through plenum	Cut batts to 610x610mm, lay directly on tiles, butt joints, no gaps
Rockwool RW3 (100mm)	Alternative — higher density for better low-frequency absorption in plenum	Same as above; heavier so verify grid can support combined weight

Plenum Barriers

Product	Purpose	Installation
15mm Knauf Soundshield Plus + acoustic sealant	Prevents sound flanking over partition walls through shared plenum	Gypsum fixed to partition head, sealed to slab above with Tremco sealant

Electrical Boxes Behind Acoustic Panels

Critical Construction Detail

Absorption panels are 50mm thick. A standard back box recessed into gypsum is now 50mm behind the panel face — inaccessible, unpluggable, and a code violation in most jurisdictions (outlets must remain accessible).

Solution by Wall Type

Wall	Recommendation	Reason
Studio north (camera wall, Wall 1)	Option A — Box extension ring	Clean flush finish, no visible gap on camera
VO Live / Control (non-camera, Wall 5/6)	Option B — Panel gap	Faster install, acoustic impact negligible
All STC-rated partitions (Wall 5/6/7)	Putty pads + staggered boxes mandatory	Regardless of option chosen

Option A — Box Extension Ring (50mm)

Install standard back box in gypsum wall at correct height
Fit 50mm metal extension ring to front of back box
Panel cut-out: measure ring face exactly, cut clean rectangle in panel
Outlet face sits flush with panel face
Panel attaches via z-clips (NOT adhesive) — must remain removable for service

Option B — Panel Gap (15cm Clear Zone)

Install outlet at correct height (45cm AFF standard, 265cm AFF green screen)
Leave 15cm clear zone around each outlet — no panel placed over outlet
Surround outlet with panels on three sides
Acoustic impact: −0.11 m² absorption per outlet gap (acceptable)

STC Partition Rules — Mandatory on All Partition Walls (Wall 5, 6, 7)

NO back-to-back outlets on same partition wall — reduces STC by 3–8 dB
STAGGER outlets minimum 300mm: if east face at 45cm AFF, west face at 90cm AFF
ACOUSTIC PUTTY PAD behind every box (OSI SpecSeal or equivalent)
Z-CLIP panel attachment only on walls with outlets — no adhesive (need access)
CONDUIT SEAL: Tremco acoustic sealant around every conduit entry point at gypsum face

Stagebox Penetrations (SB-01, SB-02)

32mm steel conduit through wall
Pack annular gap with Rockwool + Tremco sealant, seal both wall faces
Conduit must not be rigid-coupled to wall on both sides — one end flexible connector

SSOT v3.1 · March 2026 · Source: DXF → ezdxf → verified