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Solution libraryRockfon® Mono® Acoustic

ContentsPerimeter finishingStandard solution . . . . . . . . . . . . . . . . . . . . . . . . . 3Moulding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Shadow moulding . . . . . . . . . . . . . . . . . . . . . . . 5-6Floating perimeter . . . . . . . . . . . . . . . . . . . . . . . 7-8Recessed up-lighting . . . . . . . . . . . . . . . . . . . . . 10

System installationTransitionsMF Plasterboard . . . . . . . . . . . . . . . . . . . . . . . . . . 12Modular ceiling on T15/T24 . . . . . . . . . . . . . . . 12

Special situationsUpstand junction . . . . . . . . . . . . . . . . . . . . . . . . . 13Moveable wall connection . . . . . . . . . . . . . . . . 14External angle corner . . . . . . . . . . . . . . . . . . . . . 15Internal angle corner . . . . . . . . . . . . . . . . . . . . . 16Light / Loudspeaker integration . . . . . . . . . . . 17Square access hatch integration . . . . . . . . . . . 18Round access hatch integration . . . . . . . . . . . 19Movement joints . . . . . . . . . . . . . . . . . . . . . . . . . 20Vertical installation / mounting . . . . . . . . . . . 21Direct mounting (without plenum) . . . . . . . . 22Rockfon Mono Acoustic Flecto (vaulted) . . . 23

This document contains possible solutions for different Rockfon® Mono® Acoustic project situations. The solutions might not always be the best possible way to install Rockfon Mono Acoustic, but they can be used as inspiration for your specific case.

2 3

Rockfon Mono Acoustic – Solution Library

Standard solutionSimple and quick to install, the sealant allows neat finishing between a vertical surface (partition, wall) and the Rockfon Mono Acoustic ceiling .

After the Elegant Render is applied, the entire ceiling is aesthetically homogenous and seamless .

Concrete so�t

Ø6mm hanger rod or similar rigid hanger

Main runner

Perimeter trim

Sealant joint

Rockfon Mono Acoustic panel

Rockfon Mono Acoustic Elegant Render

Fastener (suitable for speci�c so�t)

400 mm Max. 1200 mm

40 m

m38

mm

min

. 50

mm

3

System installation – Perimeter finishing

MouldingThe moulding can be rendered, in the same way as the Rockfon Mono Acoustic panels, or it can be painted .

As wood is a material that can expand and contract depending on temperature and humidity changes, Rockfon advises against using this material and as an alternative recommends cornices made of gypsum and other synthetic materials .

Concrete so�t


Main runner

Perimeter trim

Sealant joint



Moulding


400 mm Max. 1200 mm

40 m

m38

mm

min

. 50

mm

4 5


Shadow mouldingThe gypsum for a shadow detail joint can be rendered in the same way as the Rockfon Mono Acoustic panels, or it can be painted .

As wood is a material that can expand and contract depending on temperature and humidity changes, Rockfon advises against using this material . Rockfon discourages the use of this material in this type of configuration .

Concrete so�t


Main runner

Perimeter trim

Plaster shadow moulding


Sealant jointRockfon Mono Acoustic tape R40/150



400 mm Max. 1200 mm

40 m

m38

mm

min

. 50

mm

5


Shadow mouldingThe metal shadow moulding can be rendered in the same way as the Rockfon Mono Acoustic panels, or it can be painted .


Concrete so�t


Main runner

Metal shadow moulding


Sealant joint



400 mm Max.

19 mm

1200 mm

40 m

m38

mm

min

. 50

mm

6 7


Floating perimeterThe floating gypsum border can be rendered in the same way as the Rockfon Mono Acoustic panels, or it can be painted .


Concrete so�t


Main runner

Plasterboard (12,5 - 12,7mm)

Perimeter trim


Reinforced strip/pro�le/edge bead(rigid PVC/metal)



300 mm Max. 1200 mm

40 m

m38

mm

min

. 50

mm

7


Floating perimeterThe metal profile can be rendered in the same way as the Rockfon Mono Acoustic panels, or it can be painted .


Concrete so�t


Main runner

L-pro�le

Perimeter trim


Sealant joint



300 mm Max. 1200 mm

40 m

m38

mm

min

. 50

mm

8 9


Curved floating perimeterThe floating gypsum border can be rendered, in the same way as the Rockfon Mono Acoustic panels, or it can be painted .


Concrete so�t


C pro�le

Main Runner

2 Plasterboards (6mm)

Mono Acoustic panel




300 mm Max. 1200 mm

40 m

m38

mm

min

. 50

mm

9


Recessed up-lightingThe recessed light detail can be rendered, in the same way as the Rockfon Mono Acoustic panels, or it can be painted .


Concrete so�t


Main RunnerPerimeter trim


Rockfon Mono Ready panel

Rockfon Mono Acoustic tape R40/150


300 mm Max.

Lightning channel

Varia

ble

as re

quire

d. A

dditi

onal

bra

cing

may

be

need

ed

1200 mm

40 m

m38

mm

min

. 50

mm

10 11


MF plasterboardPlasterboard can be rendered, in the same way as the Rockfon Mono Acoustic panels, or it can be painted .

Either vertically or horizontally, the connection between Rockfon Mono Acoustic and plasterboard can be installed in accordance

with the principles shown in the diagram . However, it must be ensured that if Rockfon Mono Acoustic is installed vertically at a height lower than 2000 mm from the floor, it is not in an area where it can be touched .

Concrete so�t


Main Runner

Cross tee 1200mm

Plasterboard (15 mm)Plasterboard (2x12.5 mm)

~ 200 mm Large





Mono Acoustic partPlasterboard part

11

System installation – Transitions

Modular ceiling on T15/T24The T15 or T24 components ensure the load bearing and transition of the finish between a modular ceiling and a Rockfon Mono Acoustic ceiling .

Concrete so�t


Main Runner


Rockfon Mono AcousticElegant Render

T15/T24 pro�le or alternativePPC extruded alu plain orshadow transition trim


Modular ceiling e.g. Rockfon Blanka®

300 mm Max. 600 mm

12 13

System installation – Transitions

Upstand junctionThe plasterboard upstand can be rendered, in the same way as the Rockfon Mono Acoustic panels, or it can be painted .


300 mm Max. 1200 mm

40 m

m38

mm

min

. 50

mm

Concrete so�t


Main Runner

Plasterboard




Perimeter trim


13

System installation – Special situations

Moveable wall connectionThe angle trim ensures the load bearing and connection between a moveable wall rail and a Rockfon Mono Acoustic ceiling .

40 m

m38

mm

min

. 50

mm

Concrete so�t


Main Runner


Moveable wall top support



300 mm

14 15


External cornerA small area of plasterboard supported by a reinforced strip will enable the creation of good looking, stable and aligned corners .In order to compensate for the 40 mm thickness of Rockfon Mono Acoustic, the plasterboard area should comprise three 13mm boards or two 13 mm and one 15 mm board .

After the render is applied, the entire ceiling is aesthetically homogenous and seamless .

40 m

m38

mm



Ø6mm hanger rod orsimilar rigid hanger

Plasterboard

Main Runner


Reinforced strip/pro�le/tape


40 mm 38 mm

15


Internal angle cornerSimple and quick to install . An acrylic sealant should be used at the juncture of the two Rockfon Mono Acoustic panels .

40 m

m38

mm

min

. 50

mm

Perimeter trim


Sealant joint

Main Runner



Concrete so�t



40 mm


400 mm Max. 1200 mm

16 17


Light / Loudspeaker integrationThe Rockfon Mono Acoustic panels are 40 mm thick and therefore it must be confirmed that the built-in / recessed lighting fasteners / connections are compatible .

Light and loudspeaker reinforcement is mandatory . When the system is installed to bear load, Rockfon recommends to fix the panel with 2 screws in the middle instead of 1 (up to 1 .5kg point load) or with 2 screws + profile reinforcement (>1 .5kg point load or >2kg/m2 evenly distributed load) .

MDF Board (3mm)


Light �tting / or loudspeaker


Concrete so�t



300 mm Max. 300 mm Max.

17


Square access hatch integrationAccess hatches can be finished with Rockfon Mono Acoustic Elegant Render for a consistent appearance .

Access hatches are available in standard 400x400 mm and 600x600 mm modular sizes . Other dimensions are available to accommodate air-conditioning equipment . Contact Rockfon for detail . The square access hatch should be installed from underneath the grid system!

Cut out 30x3mm grooveHatch frame should �t exactly in this groove


Mono Acoustic inspection hatch400 x 400mm or 600 x 600 mminstalled under the grid system!


Concrete so�t




18 19


Round access hatch integrationRound access hatches are opened by rotating and releasing the opening . Round access hatches are available in 700 mm diameter . Reinforcement around the hatch is mandatory .

They are made from aluminum, pre-painted white and are ready to be rendered . They can be finished with Rockfon Mono Acoustic Elegant Render for a consistent appearance . Once finished, only a small tooled joint of approximately 1 mm is left for the operating clearance .

Photo: Adam Mørk


Mono Acoustic inspection hatchØ700mm Installed laying in the grid System!


Concrete so�t




19


Movement jointsMovement joints in a Rockfon Mono Acoustic ceiling must coincide with the movement joints in the building .

In the case of large dimension ceilings, the Rockfon Mono Acoustic ceiling must be installed with a movement joint . The maximum surface area between these joints is limited to 300 m2, and the largest dimension must not exceed 25m .

Concrete so�t


Main Runner



Movement joint: leave hollow or �ll with foam.


L-pro�les

Perimeter trim

Sealant Joint


40 m

m38

mm

min

. 50

mm

20 21


Plasterboard (15 mm)Plasterboard (2x12.5 mm)

Rockfon Mono Acoustic Tape R40/150



Plas

terb

oard

par

tRo

ckfo

n M

ono

Acou

stic

Vertical installationAfter having received a prime coat, plasterboard can be finished with Rockfon Mono Acoustic Elegant Render .

Rockfon recommends installing Rockfon Mono Acoustic on walls from 2000 mm above finished floor level to ensure that it cannot be touched when the building is operational .

21


Concrete so�t

Rockfon Mono Acoustic Direct panel


40 m

m


Direct installation (without plenum)Rockfon Mono Acoustic can be installed directly to a soffit / substrate whilst maintaining high sound absorption properties .

The evenly distributed weight of a directly installed Rockfon Mono Acoustic is low at approximately 6 kg/m2, however, it is advisable to check that the supporting structure / soffit is capable of taking the load .

When directly installing Rockfon Mono Acoustic the following points should be checked: • Surface level / flatness: the maximum level tolerance is 2 mm to

one metre and 5 mm over five metres . This tolerance is valid for all directions .

• Soffit / substrate condition: The substrate must be dry, stable, non-crumbled and capable of achieving a good fixing . Air leakage through the soffit needs to be controlled and avoided!

• Fasteners: They must be suitable for the substrate . For example, in plasterboard (12,7 mm), it is advisable to use large screws .

22 23


Concrete so�t

Rockfon Mono Acoustic Direct panel

Plasterboards,Thickness to be adapted

According to the radius of the curve

Main Runner

Ø6mm hanger rod or similat rigid hanger

Large screws (for direct fastening into plasterboard)Rockfon Mono Acoustic Elegant Render

Fastener (suitable for speci�c so�t)Dimension according to the radius of the curve

Dimension according to the radius of the curve

Rockfon Mono Acoustic Flecto (vaulted)Rockfon Mono Acoustic Flecto ceiling panels allow for installation to concave or convex surfaces with a radius of 1500 mm minimum .

A Rockfon Mono Acoustic Flecto ceiling should be fitted to a curved structure . Either a solid structure or a ‘’shell’ or framework of the desired geometry should be constructed .

The structure or “shell” serves as a support for the fastening screws and the Rockfon Mono Acoustic Flecto panels . A ‘’shell’’ framework would typically be constructed using plasterboards with the radius determining the type of board to be used to make the shell, e .g . 1x 12,7 mm, 1x 9,5 mm or 2x 6,0 mm . The Rockfon Mono Acoustic Flecto panels should be fastened to the structure using large-pitch screws (e .g . Wurth 0189 39 70) .

Rockfon advises against using timber panels to make supporting structures/shells .

23


| All colour codes m

entioned are based on the NCS - N

atural Colour System®

© property of and used on licence from N

CS Colour AB, Stockholm

2010.Subject to alterations in range and product technology w

ithout prior notice. Rockfon accepts no responsibility for printing errors.

RockfonROCKWOOL Limited T/A ROCKFON

14th Floor, Chiswick Tower, 389 Chiswick High Road, London, W4 4ALTel: +44 (0) 208 222 7457 www.rockfon.co.uk

06.2017

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