External wall insulation incorporating drained cavities

Technical Guidance Document

Insulated Render and Cladding Association, 2025
External wall insulation incorporating drained cavities Download document

Document Status

Current

Supplement

Core Supplement

Series

Technical Guidance Document

Abstract

Provides detailed guidance on the selection and installation of system components such as insulation materials, adhesives, fixings, and finishes. The guide covers both new build and retrofit applications, emphasising the importance of proper planning, accredited installers, and adherence to technical standards to ensure high-quality, durable, and thermally efficient installations. It also addresses maintenance, condensation and damp prevention, and includes detailed drawings and references to support correct detailing and compliance.

History

Supersedes Best practice guide: external wall insulation 2015.

Subjects

  • Coverings and surface finishes
  • Cladding/covering
  • Panel/slab cladding, external insulating cladding

Publisher History

The Insulated Render and Cladding Association is the trade association for the external wall insulation industry in the UK and Europe, representing the system designers, specialist installers and component suppliers.

Information

NBS

NBS has produced specification systems and information products for construction industry professionals for more than 40 years. The National Building Specification is the recognised UK national standard and is used by over 5,000 organisations. NBS is part of RIBA Enterprises Ltd.

Accuris

We connect trusted knowledge to customers' workflows – mitigating risk, increasing efficiency and accelerating innovation For more than 60 years, leading R&D and engineering-intensive organizations have relied on us to achieve on-time, on-budget delivery of complex projects and new products. We deliver an unparalleled combination of technical content and Artificial Intelligence (AI) technologies to surface answers from the vast universe of technical knowledge, both inside and outside the organization. In a single interface, we connect the dots between information scattered across many different sources, allowing technical professionals to make better, more informed decisions faster.