Roundtower Insulating Plaster

Roundtower Insulating Plaster is a lightweight, highly breathable lime plaster designed to significantly improve the thermal performance of solid-walled buildings while managing moisture naturally. Acting as a plaster, insulation, and dehumidifier in one, it offers a practical, low-impact solution for both heritage and sustainable construction projects.

Formulated with Natural Hydraulic Lime (NHL 2) and recycled ultra-lightweight mineral aggregates, this plaster combines low strength, high flexibility, and advanced vapour permeability with excellent insulating performance.

✔️ Thermal Conductivity (K-value): 0.12 W/m·K
✔️ Breathable & Vapour Open: Functions like NHL2 render
✔️ Application Thickness: Up to 30mm in a single coat
✔️ Binder: NHL2 with mineral, non-organic additives
✔️ No framing or boards required – direct to wall application
✔️ Suitable for internal and external use

Contact us for pricing and availability.

Please call or email us for current pricing, bulk discounts, and delivery options.

✔️ Pack Size: 25kg paper bags