Projected Cork UAE | Sprayed Cork Insulation

Name: Projected cork
Brand: Kilnher

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Projected cork

Cork granules sprayed onto a roof, a facade or a wall in two passes, 2 to 4 mm thick. It insulates, it takes movement without cracking, and it leaves a seamless surface with no board, no joint and no fixing.

Ecork by Kilnher. Photography: Kilnher.

System Ecork HD by Kilnher

Applied at 2 to 4 mm, sprayed in two or more coats

Thermal conductivity 0.0610 W/m·K to EN 12667

Indoor air emissions Class A+

The material

Cork is bark. It is stripped from the living tree every nine years without felling it, and the tree carries on. Ground to a 0.1 to 0.4 mm granule and carried in a water-based resin, it can be sprayed onto almost anything.

That matters most where insulation board cannot go. A roof with a hundred penetrations, a facade with mouldings and reveals, a parapet, a soffit, a curved wall — anywhere a rigid board would need cutting, fixing and then sealing at every edge. Ecork follows the shape and leaves one continuous surface behind it.

It is elastic, which is the second reason to use it. A sprayed cork layer takes small structural movement without opening the hairline cracks a rigid render would show, and it stays permeable to water vapour rather than trapping moisture behind itself.

Kilnher make it in Valencia and supply it in 25 standard colours, with RAL and NCS to order. On a Gulf roof the colour is not decoration — a light one reflects, and the surface it sits on is the one taking the sun all day.

Thermal conductivity of 0.0610 W/m·K

Measured to EN 12667. Applied at the recommended 3 to 4 mm where thermal or acoustic performance is the point of the specification, rather than the 2 mm decorative build.

Class A+ for indoor air emissions

The highest band of the French indoor air emissions scale. The data sheet records a VOC emission figure of 25. We publish the class and the number rather than the word printed on the pail, which claims zero.

Vapour permeable, Class 1

Water vapour permeability Class 1 to EN 1062-3. The layer breathes rather than sealing moisture into the substrate behind it — which is the whole argument for cork over a closed coating on an older wall.

Elastic, so it does not craze

The elasticity that lets it take structural movement is what keeps micro-cracks out of the finish. On a roof or a parapet that moves daily with the temperature, a rigid coating is the thing that fails first.

Adhesion of 1.9 MPa to concrete

Tested to EN 1542. Sprayed at 40 to 60 cm with the substrate below 8 % moisture; very porous surfaces are primed with Primer Cork first.

Aged 3,200 hours before it was sold

Artificial weathering to UNE-EN-ISO 11507:2007. Relevant here: this is an exterior coating that spends its life in direct sun, and the ageing test is the only honest guide to how the colour holds.

Ecork in place

Sprayed cork on roofs, facades and walls — over masonry, render, brick, metal deck and painted timber. Manufacturer reference photography from Kilnher; these are not projects our crews delivered. Photography: Kilnher.

Aerial view of a white apartment block with projected cork roof terraces and a pool below — At building scale — roof terraces, upstands and plant bases in one continuous coating.

Brown projected cork over a standing seam metal roof with a flue and rooflights — Over a metal deck. The coating follows the profile and seals around the flue.

Close view of brown projected cork on a corrugated roof against a blue sky — The granule up close — 0.1 to 0.4 mm cork, carried in a water-based resin.

Ochre projected cork facade on a single-storey house with a white door — A facade in ochre. Twenty-five standard colours, with RAL and NCS to order.

Yellow projected cork facade with white window surrounds and dark green shutters — Cut cleanly to reveals and surrounds without a bead or a stop.

Grey projected cork over a brick wall lit at night, the brick coursing still legible — Over brick — thin enough at 2 mm that the coursing still reads through it.

Red brick effect projected cork between cream rendered columns on a house facade — Worked as a brick effect, with the rendered columns in a second colour.

Grey projected cork taken over a roof parapet and down its outer edge — The parapet — where a board has to stop and a sprayed coating does not.

Pale grey projected cork wall in raking light with palms and an ochre building beyond — In raking light the texture is the finish; there is no joint to find.

Applicator spraying projected cork onto a painted brick wall from an access platform — Applied from a platform at 40 to 60 cm, in two or more coats.

Projected cork being sprayed over painted timber cladding — Over painted timber cladding — a substrate a rigid board cannot easily take.

Applicator spraying ochre projected cork onto a house facade beside a window — Colour is in the material, so there is no separate decorating trade behind it.

Gloved hand holding the spray gun used to apply projected cork to a wall — A 5.5 mm gun at 3.5 to 4.5 kg air pressure.

Ecork projected cork pail and one litre toner bottle by Kilnher — Supplied in 12 kg pails with a separate toner.

Where it is specified

Roofs and terraces, including surfaces crowded with penetrations and upstands Facades, over render, masonry, concrete and previously painted surfaces Parapets, soffits, reveals and mouldings a rigid board cannot follow Older walls where the build-up must stay vapour permeable Walls and ceilings needing thermal or acoustic improvement without losing depth As a base beneath paving, ceramics and parquet

Specify it

Applied thickness 2 to 4 mm; 3 to 4 mm where thermal or acoustic performance is required

Consumption 1.08 kg/m² per mm of dry film; 2 kg/m² for 2 to 3 mm in two coats

Application Sprayed with a 5.5 mm gun at 40 to 60 cm, 3.5 to 4.5 kg air pressure, two or more coats

Between coats 4 to 6 hours; touch dry 2 to 4 hours, fully dry 24 to 48 hours

Substrate Firm, free of loose particles and grease, below 8% moisture. Very porous surfaces primed with Primer Cork

Conditions 5 to 50 °C, never below 5 °C during application or drying, relative humidity below 80%

Colour 25 standard colours; RAL and NCS to order against a minimum quantity

Packaging 12 kg pails, with toner supplied separately

Specification clause

Projected cork: Ecork HD by Kilnher, water-based cork coating applied by spray at a dry film thickness of [2 / 3 / 4] mm in two or more coats, in colour [ref] to the approved sample panel, over a substrate below 8% moisture and primed with Primer Cork where porous. Thermal conductivity 0.0610 W/m·K to EN 12667; water vapour permeability Class 1 to EN 1062-3; adhesion to concrete 1.9 MPa to EN 1542; indoor air emissions Class A+. Applied between 5 and 50 °C at relative humidity below 80%. Supply and application by Earth Layers by Conmarble.

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.

Questions specifiers ask

Short answers, restating what this page already sets out. The specification pages carry the data behind each one.

What is projected cork and how is it applied?

Projected cork is cork granules carried in a water-based resin and sprayed onto roofs, facades and walls, 2 to 4 mm thick in two or more coats. Earth Layers applies the Ecork HD system by Kilnher with a 5.5 mm spray gun at 40 to 60 cm, at 3.5 to 4.5 kg air pressure, over a firm substrate below 8% moisture; very porous surfaces are primed first.

Where can projected cork be used?

It is specified on roofs and terraces, including surfaces crowded with penetrations and upstands; on facades over render, masonry, concrete and previously painted surfaces; on parapets, soffits, reveals and mouldings a rigid board cannot follow; on older walls that must stay vapour permeable; on walls and ceilings needing thermal or acoustic improvement; and as a base beneath paving, ceramics and parquet. Substrates include masonry, render, brick, metal deck and painted timber.

How thick is a projected cork coating and does it insulate?

Applied thickness is 2 to 4 mm. Where thermal or acoustic performance is the point of the specification, 3 to 4 mm is recommended; 2 mm is the decorative build. Thermal conductivity is 0.0610 W/m·K measured to EN 12667. Because the coating is sprayed, it insulates surfaces rigid insulation board cannot follow — roofs crowded with penetrations, mouldings, reveals and curved walls — in one continuous surface.

Does sprayed cork crack or fade over time?

The coating is elastic, so a sprayed cork layer takes small structural movement without opening the hairline cracks a rigid render would show. On a roof or parapet that moves daily with the temperature, that elasticity is what keeps micro-cracks out of the finish. The product was aged 3,200 hours in artificial weathering to UNE-EN-ISO 11507:2007, and adhesion to concrete tests at 1.9 MPa to EN 1542.

Is projected cork breathable?

Yes. Projected cork has water vapour permeability Class 1 to EN 1062-3, so the layer breathes rather than sealing moisture into the substrate behind it. It stays permeable to water vapour instead of trapping moisture, which is the argument for cork over a closed coating on an older wall where the build-up must remain vapour permeable.

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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.

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