Product code LS-A
Silentium Alto
Asymmetric double-glazed acoustic partition · 100 mm
Rw 51 dB
Laboratory tested
Laboratory tested as a complete assembly to ISO 10140-2, rated to ISO 717-1:2020 (C −1 · Ctr −4). Specimen: 12 mm float glass, 60 mm air gap, 6 + 6 mm laminated glass, 100 mm total. GiB mbH, Arnstorf, Germany · DAkkS · ISO/IEC 17025 · D-PL-18520-01-00 · Report E260413A1/1_rev00 · 14 April 2026.
Laboratory-tested acoustic separation with an asymmetric glazing build-up.
Silentium Alto is built on the same 100 mm aluminium structure as Silentium 100. The difference is the glazing: one monolithic pane and one laminated pane, separated by a 60 mm air gap. The asymmetric build-up was tested as a complete assembly at the same DAkkS-accredited laboratory and is rated Rw 51 dB. Depth, face width, sightlines, finishes and door integration are shared with Silentium 100, so the two systems sit on one floor without a visible change.
- Tested as a complete assembly: Rw 51 dB
- Same 100 mm depth, 40 mm face width and sightlines as Silentium 100
- Asymmetric glazing: one monolithic pane, one laminated pane
- Mixes with Silentium 100 on the same floor without a visible change
- Direct integration with the Porta door system
- Full finish range: powder coat, anodised, PVD
Every figure, with the evidence behind it.
Glazing build-up
12 mm float · 60 mm air gap · 6 + 6 mm laminated
Rw 51 dB
C −1 · Ctr −4
Glazing build-up
10 mm toughened · 60 mm air gap · 10 mm toughened
Rw 45 dB
C −3 · Ctr −5
CalculatedPrediction · INSUL v9.0.24 · VIBROCOMP ME FZCO · rated to ISO 717-1:2020 · July 2026
Laboratory tested: Measured on the complete assembly at an accredited laboratory. Report reference published. Calculated: Predicted by an independent acoustic consultant using recognised modelling software. Not a laboratory measurement. Other build-ups are assessed by the engineering team per project.
Acoustics
- Weighted sound reduction
- Rw 51 dB
- Spectrum adaptation
- C: −1 · Ctr: −4
- Test standard
- ISO 10140-2
- Rating standard
- ISO 717-1:2020
- Laboratory
- GiB mbH · DAkkS · D-PL-18520-01-00
- Report
- E260413A1/1_rev00 · 14 April 2026
Dimensions
- Construction depth
- 100 mm
- Face width
- 40 mm
- Air gap
- 60 mm
- Maximum height
- Confirmed per project · span and glass build-up
- Tested specimen glazing
- 12 mm float · 60 mm air gap · 6 + 6 mm laminated
Construction
- Profile material
- Aluminium 6063-T5 / T6 · EN 573-3 · EN 755-2
- Structure
- Shared with Silentium 100 · BS 5234-2 tested on that structure
- Gaskets
- EPDM acoustic, continuous
- Modularity
- T-slot post system · demountable
Surfaces
- Powder coat
- Qualicoat Class 2 · full RAL range
- Anodising
- Natural to black
- PVD
- Champagne, bronze, gold, black
Profile logic
The same twin-profile construction as Silentium 100, with no rigid connection between the glass planes. Identical depth, face width and post logic, so both systems share sightlines and door integration.
Gasket & sealing
Continuous EPDM acoustic gaskets and isolated floor and ceiling connections, following the same flanking-control logic as the Silentium 100.
Glass configuration
Asymmetric double-glazed builds: a monolithic pane on one face and a laminated pane on the other. Clear, low iron, frosted, fluted, textured and acoustic laminated faces. Decorative faces are outside the laboratory test and are assessed per project.
Typical applications
- Meeting rooms requiring laboratory-tested separation
- Private offices and management suites
- Mixed-system floors alongside Silentium 100
- Enclosures where one monolithic face is preferred
Finish compatibility
Powder coat RAL, anodised (natural to black), and PVD.
What to confirm before you specify.
Stated plainly, so nothing surprises you at submittal stage.
- Alto is not a slimmer system. It has the same 100 mm depth and 40 mm face width as Silentium 100; it differs in the glazing build-up.
- The Rw 51 dB result applies to the tested build-up with flat glass on both faces. The Rw 45 dB figure for twin 10 mm toughened glass is a calculation, not a laboratory measurement.
- Fluted, textured and other decorative faces change the build-up. They are assessed per project and are not covered by the laboratory test.
- BS 5234-2 robustness tests were carried out on the shared Silentium structure; Alto was not separately tested.
- Maximum height, lead times and warranty terms are confirmed per project.
Consultant-ready files.
Silentium Alto technical data sheet
Technical data sheet · Silentium Alto · 12 / 60 / 6 + 6 mm · PDF · 35 pages
System description, drawings, acoustic data with the original reports attached.
Silentium Alto 10 · 60 · 10 technical data sheet
Technical data sheet · Silentium Alto · 10 / 60 / 10 mm toughened · PDF · 32 pages
Calculated acoustic rating (Rw 45 dB). Not a laboratory result.
Rw 51 dB laboratory test · summary
Evidence summary · Silentium Alto · 12 / 60 / 6 + 6 mm · HTML · 14 April 2026
Result, standards, specimen, laboratory, accreditation and scope of the test.
GiB test report E260413A1/1_rev00
Acoustic test report · Silentium Alto · tested specimen · PDF · rev00 · 14 April 2026
Full laboratory report. Issued to architects and consultants on request.
Plan, section and junction details
CAD details · Silentium Alto · DWG
Consultant-ready specification clauses
Specification text · Silentium Alto · Text
Speak with the engineering team.
System selection, acoustic data, CAD details, and specification text, prepared at the level required for formal project submission.
