Directly Mounted Acoustic System
with Synthetically Bound smooth porous Finish
Directly mountedacoustic ceilingsystem with synthetically bound smooth porous Finish
Information for Architects
M&W Specification – Without Product Names
material and works
To be used for tender with no CDP
(contractor’s design portion CDP)
[…..]Directly mounted, seamlessAcoustic System
*****Insert the appropriate section number above for either CSI or CAWS or any other format*****
PART 1-PRODUCTS AND SYSTEMS
1.1Seamless, directly mounted acoustic system, for both walls and ceilings,with high performance, non-combustible acoustic boards, bonded with hydraulic mortar, and a smooth hand applied acoustically porous finish.*****this system is based on the directly bonded acoustic system StoSilent Direct with the StoSilent Board MW 100 (66mm thick) and an intermediateand finish coat of StoSilent Basic*****
- The Finish:Top coat: Smooth, hand applied synthetically bound, acoustically porous intermediate coat and finish coat***StoSilent Top Basic***
Colour: [………].*****select colour from the manufacturers colour chart*****
The system :
- Primer and bonding bridge, appropriate for the substrateand as recommended by manufacturer.
II.Adhesive tape to create air-tight and water diffusion sealed joints, made of butyl rubber, weatherproof, UV-resistant
III.Synthetically modified mineral adhesive as bonding agent
IV.Acoustic board: pre-coated sandwichacoustic board made of expanded glass granulate and mineral wool.
- Size: [600 mm x 800 mm]. *****insert the desired size*****
- Thickness: 66 mm. *****46mm board thickness available with different absorption values*****
V.Porous joint filler of same texture and porosity as adjacent acoustic boards, made of expanded glass granulate and synthetically binder, hand applied, sanded and grinded
i)Noise reduction coefficient:
Double layer coating system Noise reduction coefficient : up to 0.75 (L) αw as per EN 11654 (smooth porous coat)
1)Weighted sound absorption coefficient
up to 0.75 (L) αw as per EN 11654 (smooth porous coat)*****based on the choice of finish StoSilent Top Basic*****
VI.Intermediate coat:Synthetically bound, hand applied smooth porous base coat..*****StoSilent Top Basic*****
- Hand applied
- smooth
- Apparent density: 1.3 – 1.5 g/cm³ in accordance with EN ISO 2811.
- PH value: 8.0 – 9.0.
- Lightness value: 71.
- Degree of whiteness: 49%.
- Layer thickness 1-2mm
VII.Synthetically bound, smooth porous finishing coat
- Hand applied
- Apparent density: 1.3 – 1.5 g/cm³ in accordance with EN ISO 2811.
- PH value: 8.0 – 9.0.
- Lightness value: 71.
- Degree of whiteness: 49%.
- Layer thickness 1-2mm
VIII.Perimeter detail as recommended by the manufacturer
IX.Fire Classification: Non-combustible, A2-s1, d0 as per EN 13501.
X.Substrate to be sealed airtight to ensure longest possible renovation periods.
PART 2 -QUALITY, MATERIALS AND WORKMANSHIP
Quality
2.1Samples
One singleboard of complete system including adhesive, with applied finish of proposed colour, texture and incorporating all perimeter or special details.
2.2Site Benchmarks
Install an area not less than 5m² of the complete system to be checked and accepted in advance of the main installation.
Technical/ Functional Requirements
2.3Generally
i.The works shall be installed within the fixing zones indicated on the Design Drawings.
ii.The works shall accommodate all architectural and functional features indicated on the Design Drawings, whilst maintaining the fire and acoustic performance.
iii.The works shall include fixings, seals, insulation and all other components/ accessories necessary to complete the works as supplied/ recommended by the manufacturer to suit the service conditions.
iv.Systems shall accommodate light fittings, grilles, smoke detectors, PA speakers, sprinkler heads or other service penetrations as indicated on the Design Drawings and manufacturer’s recommendations or required by the Services Engineer.
v.Provide additional pattresses and supports as necessary to receive such fittings.
vi.Concealed access panels coated with the same surface shall be provided where indicated on the Design Drawings.
vii.Unless specified otherwise, joint widths and configurations shall be as recommended by the manufacturer for acceptance by the Architect.
viii.Locations of joints shall be as indicated on the Design Drawings, or where recommended by the system manufacturer to the acceptance of the Architect.
ix.Joints shall align with interfacing systems and shall reflect joints in the substrate for movement. Gaps within joints shall be uniform, unless specified or indicated otherwise on the Design Drawings.
x.Movement joints shall accommodate all foreseeable movements and expansion/ contraction whilst maintaining the overall system performance and appear as similar to the standard joint as possible.
2.4Fire
2.5Surface Spread of Flame
i.The works shall be classified as ‘non-combustible materials as defined in the Building Regulations and shall achieve A2-s1, d0 as per EN 13501
2.6Durability of Components
ii.The works shall not deteriorate under normal usage provided regular cleaning and maintenance is carried out in accordance with the manufacturer’s recommendations.
Warranties and Certification
2.9Materials and Installation
i.Provide examples of reference projects at least 15 years old
ii.Provide QA/QC systems.
iii.Provide European Environmental Declarations
iv.Provide certificates of TUV if applicable.
v.Provide local technical support.
vi.System to be resistant to colour fading.
2.10Certification
Provide Agrement certification for the ceiling system.
Provide CE-declaration certification
2.11Fabrication
i.Panels shall be protected against the effects of corrosion after fabrication and prior to application of finishes.
ii.All cutting and drilling of ceilings panels and associated members, including apertures for services, shall take place before the application of finishes. Site cutting or drilling is not permitted.
2.12Manufacturing Tolerances
i.A high degree of accuracy is required in the fabrication of the works in order to ensure accurate assembly on Site. This shall include the requirement to accurately locate repetitive units in relation to gridlines without accumulation of tolerances and that all joints are matched for level and alignment.
Workmanship
2.13Installation
Installation and workmanship to be in accordance with the manufacturers recommendations including scaffolding.
2.14Setting Out and Protection
i.The works shall be adequately protected from damage and dirt.
ii.The works shall be set out accurately, free from undulations and lipping, with all lines and joints straight and parallel to the planning grid.
iii.The works shall be fixed securely with additional bracing and stiffening as necessary to provide a rigid system.
iv.Light fittings, grilles, fire and smoke barriers, etc. shall be in the correct positions relative to the ceiling grid, prior to commencing installation. Common setting out points shall be used.
2.15Installer
Only installers trained and registered by the Manufacturer may install the ceiling system.
2.16Handling and Storage
The works materials shall be handled and stored in accordance with the manufacturer’s recommendations.
2.17Suspension System
i.The works shall be installed within the fixing zones indicated on the Design Drawings.
2.18Movement Joints
i.Movement joints shall be as indicated on the Design Drawings.
ii.The works shall be installed in a manner that does not compromise the panels’ integrity or appearance.
iii.Movement joints shall be provided as appropriate for the area of ceiling and/or to coincide with movement joints in the surrounding structure.
iv.System movement joints to be in accordance with manufacturer’s requirements.
2.21Remedial Works
i.Repair all damage when directed by the Architect.
ii.All remedial works to surface finishes shall only be accepted if a perfect match is achieved. Failure to comply with this requirement will require the Contractor to replace the component.
2.22Installation
i.Finished ceiling levels shall be as indicated on the Design Drawings ±2mm in 1000mm length.
ii.Check all Site dimensions before commencement of installation.
iii.The Detailed Design shall accommodate all specified tolerances and differences between actual Site dimensions and dimensions shown on the Working Drawings.
iv.Joints between panels to be glued and sanded in strict accordance with the manufacturer’s recommendations.
v.Panel to panel lipping or plan offset shall not exceed 0.5mm and be non-cumulative across any ceiling.
vi.Grid creep across any ceiling shall not exceed 1.5mm in a 10m length.
vii.Install square, regular to line, level and plane within specified tolerances. Do not use cartridge or power activated methods for top fixing or rivets for bottom fixing of hangers.
viii.Obtain acceptance from the Architect before drilling or cutting parts of the structure.
End of Section
M&W Specification Doc 1(With Unnamed products)