Cornerstone Insulating Render is a dry ready mixed render and plaster designed as a lightweight fibred basecoat for external applications or a basecoat and topcoat for internal applications within a minimum of a two-coat render application. Available in the colour white.

Engineered with precision to enhance the thermal performance of solid walled masonry whilst exceeding the high vapour permeability and flexibility of a traditional NHL2 lime render. Utilising 100% pure natural hydraulic lime, recycled glass aggregates and conservation-appropriate additives, this lightweight render outperforms popular market alternatives. Available as standard with fibres and Saint-Astier® NHL2.

Well-suited for projects looking to reduce thermal losses within walls, with a measured K Value of 0.12, a 50mm application will improve the U value of a solid wall by 50% or more.

Features and benefits:

Our most popular lime render
Highly vapour permeable to support moisture management
Can absorb, store and buffer excess moisture
Ideal for consistently damp backgrounds
No risk of render rot or breakdown for moisture-prone areas
Non-organic aggregate prevents rot and decay
Improves indoor air quality and thermal comfort
Can be applied at 50mm per pass as a high-build render
Lightweight for less demanding levelling and finishing
Apply directly to walls in areas with limited space
A viable solution for Part L1 legislation

UKCA Mark Render - Insulating Render