NBS Specifications

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SonaSpray K13 special
Spray on one coat acoustic finish for noise reverberation and thermal control. Finer texture than standard K13 compressible surface with a range of standard colours:- white, beige, 3 greys, beige-white and green-white. Special colours are also available to order.

Coating thickness up to 30mm thick, typically sprayed at 15 – 25mm to achieve acoustic performance.

Weight 2.2kg/m.sq at 25mm thick.
Fire classification Class 1 to BS476 Part 7, Class 0 to BS476 Part 6
Naturally safe recycled cellulose fibre.  Low Embodied Energy. Dispose of as non-hazardous waste.

Typical applications
Ceilings 3metre high and above (purely visual).
Noise reverberation control in schools, village halls, Prayer halls, swimming pools.
Plus condensation control with adequate ventilation.  

Absorption coefficients at 25mm thick
Hz      250     500     1000     2000     4000              NRC          
aS      0.54     0.93    1.03      1.08      1.05               0.90            

See literature or website for full details
Consult Oscar Acoustics technical literature for details. Oscar Acoustics can also advise a design and specification and it is recommended that they are consulted early in the design process

120 SPRAYED THERMAL / ACOUSTIC CONTROL COATING TO . . . . . . . .

Survey: Carry out before installation commences.

Preparation:
Clips, hangers, supports and associated type attachments to be placed by others prior to spray application.

Ducts, piping and other suspended items to be installed after SonaSpray application or consult contractor.

Pattresses to be installed for light fittings / smoke sensors etc prior to SonaSpray application to allow firm fixing for the fitting. Pattresses to be made from plasterboard or wood not MDF which can stain the material when wet.
Wood pattresses to be fully painted to prevent any staining of material from contaminents.

Pattresses to be slightly smaller than the base of the fitting to ensure the fitting covers the pattress which should not be seen.

Pattresses to be the same thickness as the SonaSpray, the contractor to spray to the edge of the pattress and brush clean the face.

A finishing edge will be required for the SonaSpray where it does not occur naturally eg. around an opening for services to pass through a ceiling or around a staircase opening. Consult with the contractor.

The surface to be sprayed shall be inspected prior to application to determine if priming/sealing is required to ensure bond and/or to prevent discolouration by migratory stains. Prime seal accordingly. Consult with the contractor.
The contractor must install as necessary protection to other finished surfaces fromoverspray.

The manufacturer recommends 8 air changes per hour immediately after spraying for best drying conditions. Where this does not occur naturally, introduce fans and open windows. Consult with the contractor.
Consult with Oscar Acoustics for recommendations and details.

Barrier/ Bonding coat: Consult with Oscar Acoustics for recommendations and details.

Coating material:

Product reference: SonaSpray K-13 special
Colour: White / Beige / Grey / Beige-white / Tan / Green-white / Black
Standard colours. Consult with Oscar Acoustics for availability of alternative colours and to obtain samples.
Surface finish: Fine textured

Minimum applied thickness: 10mm. Coating thickness up to 30mm thick, typically sprayed at 15–25mm to achieve acoustic performance. Consult with Oscar Acoustics for recommendations and details.

Finishing/ Sealing coat: Consult with Oscar Acoustics for recommendations and details.