Heritage lime render is a traditional type of external wall finish that is made from a mixture of lime, sand, and other natural materials. It is often used on historic or heritage buildings because it is more flexible and breathable than modern cement-based renders, which can cause moisture and heat to become trapped within the wall.

There are two main types of heritage lime render systems:

1. Three-coat lime render: This is a traditional system that consists of three layers of render applied to the surface of a building. The first layer, known as the scratch coat, is applied to the substrate and left to harden for a few days. The second layer, known as the floating coat, is then applied over the scratch coat and left to harden for a few days. The final layer, known as the finish coat, is applied over the floating coat and left to harden for a few weeks before it is ready to be painted or decorated.
2. Monocouche lime render: This is a more modern system that consists of  layers of specially formulated lime render applied directly to the surface of a building. Monocouche lime render is easier and faster to apply than traditional three-coat systems, and it offers many of the same benefits, including improved insulation, weather resistance, and breathabiliy.

Both types of heritage lime render systems offer a traditional and authentic look, and they are a great choice for preserving and enhancing the appearance of historic or heritage buildings.

Authentic look: Heritage lime render provides a traditional and authentic look that is perfect for historic or heritage buildings.

1. Breathability: Heritage lime render is more flexible and breathable than modern cement-based renders, which helps to prevent moisture and heat from becoming trapped within the walls of a building. This can help to reduce the risk of damage and preserve the structural integrity of the building.
2. Durability: Heritage lime render is designed to be long-lasting and durable, so it won’t need to be re-applied or repaired as frequently as other types of render.
3. Eco-friendly: Heritage lime render is made from natural materials and can be applied without the use of harmful chemicals, making it a more environmentally friendly choice.
4. Low maintenance: Heritage lime render is easy to clean and requires minimal maintenance, saving you time and money in the long run.
5. Overall, heritage lime render systems offer a traditional, durable, and low-maintenance solution for enhancing the appearance and performance of historic or heritage buildings.

Lime render systems are known for their longevity and durability. When applied correctly, a lime render system can last for many years without the need for repair or re-application.

One of the reasons that lime render systems are so long-lasting is that lime is a highly alkaline material that has natural self-healing properties. When lime render is applied to a building, it forms a hard, protective layer on the surface. If the render is damaged or cracked, the lime will react with carbon dioxide in the air to form a thin layer of calcium carbonate, which helps to seal and repair the cracks.

Another factor that contributes to the longevity of lime render is its ability to flex and move with the building. Lime render is much more flexible than cement-based render, which means that it is less likely to crack or peel when the building expands and contracts due to changes in temperature or humidity.

Overall, lime render systems are a long-lasting and durable choice for external wall finishes, and they are well-suited for use on historic or heritage buildings.