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Guidance on built-up walls

Researcher: David Metcalfe
Funded: CWCT with the support of the partners below
Total value:
  • Cladtech
  • Ffacesolutions
  • Kingspan Limited
  • Laing O'Rourke
  • Mark Heywood Associates
  • Marley Eternit Limited
  • Multiplex Construction Europe
  • National House-Building Council
  • Rockwool Rockpanel
  • Sandberg
  • Society of Façade Engineering
  • STO Limited
  • Tremco ilbruck
  • Independent Building Technology Ltd
Status: Completed 2017


This project reviewed current standards and practice for the design, manufacture and assembly of built-up walls. The aim of the project was to produce a best practice guide for industry.

Built-up (layered) walls have been used successfully for centuries but recent advances in materials and the scale of these constructions has thrown up many technical questions and a number of walls have failed to deliver the intended performance.

The study considered the many forms of built-up wall construction and all aspects of performance including:

  • Watertightness
  • Air permeability
  • Structural performance
  • Movement
  • Robustness
  • Fire
  • Thermal performance
  • Condensation
  • Acoustics
  • Durability

The study also considered the design and construction process including roles and responsibilities.


Design and construction guide – Guidance on built-up walls

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