An introduction to weathertightness design principles
- Valid from
- Information provider
- Ministry of Business, Innovation and Employment
- Information type
- Section 175 guidance
- Website, PDF
Principles of weathertightness design, including a valuable summary of critical performance components for effective cladding systems.
The information in the guide is divided into two broad sections:
Part A – Principles of weathertightness
- This section introduces the primary physical influences affecting joints and claddings that effective cladding systems must be designed and built to resist.
Part B – Weathertightness principles applied
- This section builds on the weathertightness principle of Part A to explain how some common cladding types can manage physical forces in ways that provide effective weatherresisting systems.
Knowledge of the principles of weathertightness is considered essential for all designers and builders of small-to medium-sized buildings, for building officials, educators and those with a general interest in weathertightness such as insurers, developers and funders of building projects.