Roundtower SuperTherm Finishing Plaster is a lime-based, breathable finishing coat specifically designed to be applied over Roundtower SuperTherm. It provides a durable, mesh-reinforced surface that helps stabilise the underlying insulating plaster, improves crack resistance, and creates a consistent base ready for mineral finishes such as silicate paints or breathable decorative coatings.
Applied at approximately 5mm, with a fibreglass mesh embedded (R52 Internal Grade), it delivers a robust, vapour-open “armoured” layer that supports long-term performance while remaining compatible with conservation-led, moisture-aware retrofit and new-build detailing.
Key Benefits
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Purpose-made for SuperTherm: formulated to work as a compatible finishing layer over the Roundtower SuperTherm system.
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Breathable & moisture-safe: lime-based and vapour-open to support hygrothermal performance and drying potential.
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Reinforced for durability: designed for embedded fibreglass mesh to improve tensile strength and reduce cracking risk.
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Creates a uniform finish: evens out surface texture and provides a consistent substrate for breathable mineral paints and finishes.
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Helps protect the insulation layer: adds impact resistance and surface resilience where required.
- Yield: Approx 3.5m2 when used as a finish coat.