Lime Renders

Lime render is a lime based finish designed to protect external walls while enhancing aesthetic appeal. Thanks to breathability, flexibility, and durability, it is suitable for old buildings and modern construction, helping moisture evaporate from masonry and stonework over time.

External lime render for protection and aesthetics

External lime render offers both protection and visual enhancement for exterior walls. Unlike rigid cement mortars and plasters, lime remains soft and flexible, so it moves with the building and reduces the risk of cracking and decay. Its vapour open structure regulates moisture, allowing water to evaporate rather than become trapped.

What is lime render and why use it?

Lime render is a type of plaster applied to external walls, made from lime mortar (lime, sand, and water). It has been used for hundreds of years to provide protection and attractive finishes. Compared with cement renders, traditional lime and natural hydraulic lime (NHL) systems remain flexible over time and maintain breathability. For more information, see our guide What is lime render?

Different types of lime renders

Our Lime Range includes products to suit varied applications and areas. Choosing the right mix, base, and colour helps enhance architectural details and create contrast with surrounding finishes.

Traditional lime renders for heritage and solid wall buildings

Traditional lime renders made with hydraulic lime are ideal for heritage masonry where breathability and flexibility matter most. Applied correctly, these mortars protect stonework and brickwork while delivering long lasting finishes. See this edition: Lime Render NHL 3.5 (EWI-747) – 23kg, and our fine finish option Fine Finish Lime Render NHL 3.5 (EWI-747F).

Cork insulating renders for thermal performance

Cork insulating renders combine lime with natural cork granules to improve thermal performance while maintaining breathability. They are ideal for eco conscious renovation, reducing heat loss and providing a comfortable interior climate. Explore Insulating Cork Render (EWI-745).

Lime rendering: what to look for when choosing

When you choose lime renders, consider breathability, durability, cost, suitability for the building, and the application method. Match the product to the substrate and exposure, then select colours and finishes that suit the design intent.

Breathability and moisture regulation

Lime based mortars and plasters allow moisture to move through the fabric, reducing the risk of trapped damp and decay. This quality makes them ideal for both traditional lime restoration and modern breathable construction. In exposed areas, ensure the full build up respects vapour movement from base to finish.

Durability and resistance to cracking

Because lime remains relatively soft and flexible, it accommodates small movements in masonry over time, reducing the risk of shrinkage cracks. Correctly mixed and applied, lime renders provide long term protection for external walls.

Cost factors and value for money

While initial costs can be higher than cement based products, lime offers value through reduced maintenance, better moisture management, and sympathetic performance on old buildings. Over years of use, the right system can be more economical.

Compatible paints and finishes

After curing, many projects use breathable lime paint to refine colour and texture. Try Lime Paint – Exterior (EWI-705) for a soft matt finish that preserves breathability while adding protection. You can adjust colours to achieve subtle contrast and highlight details.

How to apply lime render

Lime render should be applied over a suitable prepared base, respecting cure times and environmental conditions. Build up in appropriate coats, keep work shaded and damp as required, and finish with a texture that suits the design. For step by step guidance, read How do you apply lime render?

Frequently asked questions

Is lime render suitable for external walls?
Yes. It is ideal for exterior walls where breathability and moisture control are important.

What mix should I use for old masonry?
A natural hydraulic lime mortar such as NHL 3.5 is often specified for heritage applications, as it balances strength with flexibility and vapour permeability.

Can I paint over lime render?
Use breathable finishes such as lime paints to maintain moisture movement and preserve the aesthetic appeal of the render.

Which products suit exposed areas?
Choose robust renders from our lime renders range and consider protective lime paint where appropriate. Always follow application guidance.

Where can I get more information?
Explore The Lime Range for products, data sheets, and guidance. If you have a question, contact us and subscribe for updates.