Kevin McCloud, Grand Designs and the Rise of Cork as a Building Material

Introduction

Interest in cork as a building material has grown significantly in recent years, driven in part by its appearance on mainstream programmes such as Grand Designs. Presenter Kevin McCloud has highlighted cork within projects that focus on sustainability, performance and long-term design thinking.

Why cork featured on Grand Designs

Grand Designs typically showcases innovative building methods and materials that improve both performance and sustainability. Cork has been included in several projects due to its natural properties and ability to meet modern building standards.

Its use aligns with the programme’s focus on:

• Energy-efficient homes
• Sustainable and renewable materials
• Long-term durability and performance
• Modern construction techniques

What Kevin McCloud has highlighted about cork

Kevin McCloud has consistently supported materials that combine sustainability with real-world performance. Cork stands out because it is a natural material that delivers both environmental and practical benefits.

Key reasons cork has been praised include:

• It is a renewable material, harvested without damaging trees
• It provides strong thermal insulation
• It is breathable, helping manage moisture within buildings
• It offers durability with minimal maintenance over time

These characteristics make it suitable for both contemporary builds and the renovation of older properties.

Why cork is gaining popularity in the UK

Following exposure on Grand Designs, cork has become more widely recognised among homeowners and developers across the UK.

Its growth is being driven by:

• Rising energy costs and demand for better insulation
• Increased awareness of sustainable construction
• The need for long-lasting, low-maintenance exterior finishes
• Ongoing issues with cracking and damp in traditional render systems

Cork as an exterior wall coating

One of the most practical applications of cork in residential properties is as an external wall coating. When applied as a spray render, cork creates a seamless protective layer around the property.

This type of application provides:

• Protection from weather and moisture
• Improved insulation performance
• Reduced risk of cracks compared to traditional render
• A modern, consistent exterior finish

Relevance for South West London properties

Homes across South West London often face similar challenges, including ageing render, heat loss and damp. Materials like cork are increasingly being considered as a long-term solution that improves both performance and appearance.

The combination of insulation, breathability and durability makes it particularly suitable for older housing stock as well as newer developments.

Long-term perspective

The appeal of cork lies in its ability to deliver performance over decades rather than requiring frequent maintenance or replacement. Compared to traditional exterior finishes that may need repainting or repair within a few years, cork is designed to last significantly longer with minimal upkeep.

Conclusion

The inclusion of cork in projects featured on Grand Designs, along with the broader support for sustainable materials from Kevin McCloud, has helped bring greater attention to its benefits. As more homeowners look for durable, energy-efficient and low-maintenance solutions, cork continues to establish itself as a viable option in modern construction and renovation.