William Angliss Institute Commercial Fitout
Alexandria, Sydney
Our Services
NCC 2022 Volume One Section F7 sets minimum acoustic performance requirements for commercial buildings. These requirements apply to fitouts, not only new builds. If you are installing partitions in an office, the NCC 2022 acoustic provisions govern what you can specify and how the installation must be documented.
NCC 2022 Section F7 sets minimum STC ratings for separating walls and floors between occupancy classes. AS/NZS 2107:2016 specifies design sound levels of 40 to 45 dB for offices and 35 to 40 dB for meeting rooms. These are the benchmarks your certifier measures against.
Deemed-to-satisfy construction details or a performance solution supported by an acoustic consultant report. The specification must be documented and the installation must match it. A gap between specification and build is a compliance failure regardless of product quality.
We work alongside your acoustic consultant where required and manage sequencing, documentation, and sign-off as part of the project. Based in Wetherill Park, we know the Western Sydney councils, certifiers, and approval timelines that national retailers ignore.
A partition specification only delivers its rated STC if ceilings, services, and seals match. We sequence glaziers, ceiling contractors, and electricians so the acoustic system is complete at handover.
Acoustic performance depends on system completeness. Ceiling treatment and perimeter sealing are not optional extras. They are what makes the rated STC achievable in practice. Stemar coordinates every trade under one project manager to close the gaps.
Fabric-wrapped, slatted, or perforated panels with high NRC ratings for absorption. These solve reverberation within a zone, reducing echo in open-plan areas and collaboration spaces.
Ceiling bulkheads, plenum barriers, and perimeter seals prevent sound flanking around, over, and under the partition. Without these, your STC rating exists on paper only.
STC stops sound crossing a wall. NRC stops sound bouncing inside a room. A meeting room needs both, and lab ratings only hold if the ceiling plenum is closed and the perimeter seals are intact.
Reduces speech to a murmur. Suitable for separating general work zones where full privacy is not required. The minimum for open-plan zone boundaries.
Makes normal speech inaudible through the partition. The benchmark for meeting rooms, HR offices, and any space where call privacy matters.
Blocks raised voices and high-volume calls. Specified for boardrooms, legal offices, and spaces handling confidential client information.
Absorbs 70 percent or more of sound energy within a zone. Reduces echo and reverberation in open-plan areas where multiple conversations overlap.
Pods handle discrete-task privacy: one person on a confidential call, or a focused work session away from open-plan noise. They are self-contained units that need no building modifications.
Partitions handle zone-level acoustic separation: a quiet team area isolated from a noisy one, or an acoustically rated meeting room. They are building elements that integrate with the ceiling, floor, and services.
No building modifications required. Pods drop onto the floor and solve individual call privacy within a zone.
Tracked to the ceiling and floor with services coordinated. Partitions solve noise transmission between zones.
Zone-level acoustic design maps each product to the right problem. Partitions and pods specified together in the same scope.
Big enough to deliver. Small enough to care. Tier 1 builders deprioritise mid-market clients. Furniture retailers sell products without managing the installation. Stemar operates in the space between.
A principal walks your floor and identifies the acoustic weak points: open ceiling plenums, unsealed partition edges, HVAC crossover paths, and zones where noise bleeds between incompatible activities. You receive a fixed-price quote scoped to your floor plan and compliance requirements.
One project manager coordinates every trade: glaziers, ceiling contractors, electricians, and acoustic sealant applicators. Sequencing matters because a ceiling bulkhead installed after the partition leaves a flanking path that defeats the rated STC. After-hours and staged delivery are standard.
Partition specifications documented, installation verified against the specification, and NCC compliance documentation coordinated with your certifier. Where a performance solution requires an acoustic consultant report, Stemar manages the engagement and integrates it into the project timeline.
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Answers to the most common questions about acoustic office partitions in Sydney, from STC ratings and NCC compliance to installation scheduling.
