Building Regulations for external cladding

External cladding in England and Wales is primarily governed by Approved Document B (Fire Safety) of the Building Regulations, alongside Approved Document C (Site Preparation and Resistance to Moisture) for weathertightness and structural performance.

Key areas that apply

• Material fire classification for buildings above the relevant height threshold
• Cavity barrier and fire-stopping provisions within ventilated systems
• Structural fixing and wind-load design for the cladding system and its sub-frame
• Weathertightness and moisture management behind the cladding
• Building Control sign-off, particularly where the project is notifiable

When Building Control involvement is needed

Most cladding replacement or new-build cladding work on buildings requires either Building Control approval or, for some domestic projects, falls under permitted development — but any change affecting the external wall's fire performance should be checked against current regulations regardless of project size.

How we handle it

We confirm the regulatory route for your specific project before quoting, and where Building Control sign-off is needed, we provide the documentation required to support that application.