Our most popular insulating lime render and plaster to enhance both the thermal performance and moisture management of solid walled masonry with a refined white finish within a two coat render application. Available in a 9kg bag.
£16.48 £19.78 inc VAT
In stock
Estimated lead time is 3-5 business days
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.
Manufactured by Cornerstone 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 and conventional lime renders, with significantly improved insulation and highly flexible coating. Available as standard with fibres and Saint-Astier® NHL2.
As part of the Cornerstone range of insulating renders and plasters, Cornerstone Insulating Render offers an innovative and practical solution to enhance vapour permeability in solid-walled buildings while supporting real-world needs for improved U-values and thermal comfort.
Well-suited for projects looking to reduce thermal losses within walls, with a measured K Value of 0.095, a 50mm application will improve the U value of a solid wall by 50% or more for advanced thermal performance.
With a diverse range of lime-based products, Cornerstone defies the standard one-size-fits-all approach, providing refined solutions to tackle each project effectively. Their products can be found on prestigious buildings worldwide, blending innovation with tradition to meet evolving industry needs.
Suitable for internal use, where the binder strength is appropriate for the host background or surface. Suitable for external use when finished with Cornerstone Promix Medium or Fine and mineral paint.
Cornerstone Insulating Render suits various rendering or plastering applications, including as basecoat for external applications or a basecoat or topcoat for internal applications within a minimum of a two-coat render application. Appropriate for various project types, including conservation, renovation, or sustainable construction.
For a superfine internal finish, use Cornerstone Promix Superfine Finishing Plaster or Cornish Lime CLM66 Superfine Putty Finishing Plaster for a traditional finish.
For an attractive medium textured finish for external applications, we recommend Cornerstone Promix Medium Topcoat in an NHL2.
A 9kg bag yields approximately 15 litres of lime render or plaster and covers roughly 1.5m² at a 10mm thickness. Consumption rates will change based on how even the background is and suction. On-site trials are advised for the best yield indication for your specific project. See our Cornerstone Insulating Render Mixing and Application Guidance in the Technical Data and Documents tab for detailed instructions and best practices.
Consumption rates will change based on how even the background is and suction. On-site trials are advised for the best yield indication for your specific project.
As this contains recycled aggregates, there may be variations in colour, texture, and shape. While these variations are minimal, when colour consistency is crucial, we strongly advise each elevation is completed using material from the same batch.
Supplied in 9kg polythene-lined and colour and batch-code paper bags for easy identification on-site and palletised for ease of transport, storage, and handling.
See the Technical Data and Documentation section for detailed product information, application guidance, and datasheets. Always review any available documents before use. Each project is unique, always seek professional advice before undertaking a project.
Do not use in temperatures below 5°C or above 30°C, or if freezing conditions are predicted within the following few weeks, including wind chill. We always advise following best practices for curing and protecting fresh lime renders and plasters. Protect from adverse environmental conditions, including frost, rain, direct sunlight and drying winds.
Brand
Cornerstone
Binder
NHL2
Coat
Basecoat
Colour
White
Work
Rendering
Use
Internal, External
Application
Manual
Weight
9kg
Mix Ratio
1:3
Aggregate
2mm down recycled glass aggregate
Coverage
A 9kg bag covers approx. 1.5m2 at 10mm thickness
Yield
A 9kg bag yields approx. 15 litres
Always read any available datasheets and documentation before use.
Stock Quantities and Lead Times
Stock quantities and lead times are estimated and may differ or increase based on the order size and shipping method. If your timeline is sensitive, get in touch with the team.
Palletforce
Pallet orders with Palletforce Economy are typically dispatched from Cornish Lime within 1-2 business days, providing your item is in stock and not made-to-order. Once dispatched, Palletforce will deliver your order within 3-5 business days, depending on your location. Please ensure that your site can accommodate articulated lorries or similar-sized vehicles.
Local Delivery
The Cornish Lime team provides local delivery with a 18-tonne vehicle with a crane to assist with unloading. You will be contacted by phone to arrange delivery and ensure your site can accommodate our vehicle.
APC Parcel Courier
Orders shipped by APC parcel courier are typically shipped the next business day and arrive within 2-3 business days, providing your item is in stock and not made-to-order. APC will contact you via email with delivery information, and orders can be tracked on the APC website.
Premium or Expedited Service
For a premium or expedited delivery service, please get in touch to discuss if this option is available for your order.
For further information, see our delivery information page.
Fantastic fast curing product!
Mac –
Good product
D.P.Hatley Building Services –