A hydraulic lime, quartz sand and marble powder plaster, burnished and treated with polishing soap to give a water-repellent, seamless surface. Specified for bathrooms and humid rooms — with the maintenance regime written into the O&M.
Where it is used
Decorative surfaces in areas exposed to water or high humidityBathrooms, hammams and wet rooms, with the after-soaping regime maintainedInterior walls
Substrates
Moisture-resistant plasterboard, joints taped and filled, with 12 mm plywood backing and studs at 300 mm centresFermacell, joints taped and filled, studs at 300 mm centresTile backing board with a Stonefix or similar backing coat system, mesh embeddedBlockwork, masonry and others — suitability confirmed by the approved plastererRefer to Clayworks Design Detail DD20
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.
DryingDry after 2 – 3 days at 3 mm layer thickness
CuringTreat gently for the first 3 months; final hardness at approximately 6 months
Pot lifeMixed material must be used within 8 – 10 hours
StoragePowder keeps at least 12 months in dry, airtight containers
ApplicationAn approved Clayworks plasterer for all applications
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.
PropertyResultStandard
VOC declarationContains max. 1 g/L VOC against a Cat. A/b limit of 100 g/LChemVOCFarbV (2010)
Water behaviourWater resistant; water repellent when treated with polishing soapClayworks data sheet
Composition classPurely mineral, cement free, breathable, emission freeClayworks data sheet
Maintenance regimeAfter-soap every 1 – 2 months in wet areas with diluted polishing soap, then polishClayworks data sheet
CleaningWater with 1 – 2 spoons of Marseille soap per 8 litres, soft sponge onlyClayworks data sheet
RepairCut out the full layer along the damage and reinstate with original materialClayworks data sheet
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 completely impermeable; some deep-textured custom finishes are not water resistantNot recommended for wash basins and bathtubs that are constantly wetNot suitable for floors, or behind a cooker or stove — oils and fats stain irreversiblyNot suitable on continuously moist substratesNot acid resistant — citrus, wine and vinegar will damage the surfaceNot covered by the Clayworks clay plaster certifications and data sheet publications
Specification clause
Tadelakt: Clayworks Tadelakt in colour [ref], applied to the substrate scheduled and detailed to Clayworks Design Detail DD20, burnished and treated with polishing soap to the approved sample panel. Moisture-resistant plasterboard with 12 mm plywood backing and studs at 300 mm centres where plasterboard is used. Applied by an approved Clayworks plasterer. After-soaping regime at 1–2 month intervals to be included in the O&M manual.
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.
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.
