Knauf Silent Spacesaver is suitable in areas where floor space is at a premium and there is a requirement for a partition to provide a high level of sound reduction with a narrow width. The Knauf Silent Spacesaver system is quick to install, lightweight, and maximizes space within buildings.

Features and benefits:

  • Low overall width.
  • High acoustic performance.
  • High fire resistance.

To be installed in accordance with Knauf recommendations and British standards BS 8212-1995 and BS 8000-8:1994.

For socket penetrations, use Knauf Putty Pads. Where multiple, excessive penetrations occur, consider the use of the Knauf Wall Liner System as sacrificial layers - consult manufacturer for details.

General information

Uniclass 2015

Ss_25_10_30_35 Gypsum board partition systemsPrimary


K10/125 Metal stud partition system

K10/30 Metal stud

Specification data - Gypsum board partition systems

Product Reference

Silent Spacesaver for Commercial Projects: Silent Spacesaver SSC4/13



Stud configuration

92 mm Knauf 'I' Stud, 0.55 gauge

92 mm Knauf 'I' Stud, 0.9 gauge


Framing centres

300 mm

400 mm

For areas to receive a ceramic tiled finish.

600 mm


Head/ Floor channel

148 mm Knauf ‘U’ Channel

Utilising 148 mm Knauf Deep Flange 'U' Channel if deflection allowance is specified.


Knauf Nailable plugs at maximum 600 mm centres

Where alternative fixings are used to meet performance constraint confirmation is required from supplier.




Two layers of 15 mm Knauf Soundshield Plus to each side

Horizontal board joints

Knauf Flat Fixing Plate

Lining fixings

Knauf Drywall Screws

Knauf Performance Plus Screws

To be used with Knauf Performance Plus and Knauf Soundshield Plus Boards.

Perimeter Sealing

Two continuous beads of Knauf Sealant on Head/ Floor Channels

Knauf Intumescent and Acoustic Mastic


One layer of 25 mm Knauf Earthwool Acoustic Roll

Head condition

Structural soffit

Deflection allowance

To be determined by a structural engineer. Consult manufacturer for information.

Head track fillets

Consult manufacturer and insert requirements.

Head insulation detail


Not required


Taped and Jointed for a Seamless finish using Knauf Jointing Products

Taped and skimmed with Knauf Finishing Plaster

Knauf RMF [Ready Mixed Finishing] in accordance with General clauses

Standard product features

Fire resistance (BS 476: Parts 20 and 22 Integrity and Insulation):

90 minutes.

Acoustic rating (when tested to BS EN 10140-2:2010):

62 Rw dB.

Partition thickness:

208 mm (excluding finishes).

Maximum partition height (based on limiting deflection of L/240 at 200 Pa):

5700 mm.

Duty rating (BS 5234: Part 2 Section 1.6.2 and 1.6.3):


Product Options


- Stud configuration:

At 600 mm centres (300 mm staggered centres) with Knauf Staggered Stud Clips. Use Knauf ‘C’ Studs at corners and abutments where required.

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