The product
The heaviest interior texture, 6 to 8 mm, with the coarse aggregate fully expressed. It carries the highest acoustic figures in the interior range and the most surface relief.
Where it is used
- Interior walls and ceilings in controlled interior environments
- Spaces where acoustic absorption and surface relief are both wanted
- Bathrooms and kitchens, outside wet zones
Substrates
- Refer to the Clayworks Design Details data sheet for full substrate guidance
Application data
Coverage, thickness, mix and cure, as declared by the manufacturer. Site conditions in the Gulf sit at the top of most of these ranges — allow for it in the programme.
| Supply | 25 kg bags |
|---|---|
| Applied thickness | Top coat 6 – 8 mm |
| Coverage | 1.5 m² nominal per 25 kg bag |
| Drying | Approximately 51 – 72 hours |
| Colours | 89 standard colours plus custom matching |
| Warranty | 10 years manufacturer's warranty |
| Life expectancy | 60 years, subject to correct detailing, application and maintenance |
Performance data
Every figure below is reproduced from the manufacturer's own technical data sheet, with the test standard it was measured against. The sheet itself is in the download section.
| Property | Result | Standard |
|---|---|---|
| Reaction to fire | Euroclass A1; also tested to ASTM E84 | EN 13501, EN 15824, ASTM E84 |
| Noise reduction coefficient | 0.20 – 0.25 NRC depending on backing board | BS EN ISO 354 |
| Applied density | 1536 kg/m³ — 15.4 kg/m² at 6–7 mm | Clayworks data sheet |
| Impact | Impact diameter < 15 mm | BS EN 520 |
| Thermal conductivity | 0.97 W/mK | Clayworks data sheet |
| Moisture buffer value | 1.4 | Clayworks data sheet |
| Light reflectance value | 24.6 (Grey) to 40.1 (Green) | BS 8493:2008 + A1:2010 |
| Embodied carbon | 0.048 kg CO₂e/kg | LCA stages A1–A3 |
| VOC | Trace VOCs; mineral and inert. Emission testing published by Clayworks | Eurofins, EN 16516 / ISO 16000-6 |
Where not to use it
The limits are as much a part of the specification as the performance. Everything here is stated on the manufacturer's data sheet.
- Not for wet or shower areas
- Not for areas in direct contact with oils and fats
- Not suitable for floors, standard doors, or elements subject to frequent movement
- Custom finishes must be installed by an approved applicator
Clay plaster: Clayworks Interior Rustic Finish in colour [ref], top coat 6–8 mm over the primed substrate scheduled, to the approved sample panel. Reaction to fire Euroclass A1 to EN 13501 and EN 15824. Applied by a Clayworks Approved Applicator.
Square brackets mark the choices that belong to the project. Send us the finishes schedule and we will return the clause completed, with the sample and mock-up programme against it.
Documents
Every document is the manufacturer's own, reproduced in full and unaltered under our cover. Free to download, no form.
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Interior Rustic Finish Clay plaster · Technical data sheet · 5 pp · 1 MBDownload (PDF, 1.0 MB)
The rest of the clay plaster range
Technical support for the design team
We supply the material and we apply it, so the specification and the workmanship sit with one party. Send a finishes schedule, an elevation or a mood board and we will come back with the system, the build-up, the sample programme and a completed clause.