BASIX recognises the following external wall types:
| Name | External (Cladding) | Intermediate | Internal (lining) |
| Brick veneer | brick masonry | cavity and framing | plasterboard |
| Cavity brick | brick masonry | cavity | brick/masonry and plasterboard |
| Framed (weatherboard, fibre cement, metal clad) | weatherboard, fibre-cement sheet, metal or the like | framing | plasterboard |
| Concrete block / plasterboard | concrete block | plasterboard on battens/furring | |
| Concrete panel/plasterboard | concrete panel | plasterboard on battens/furring | |
| Single-skin autoclaved aerated concrete (AAC) | AAC block or panel | plasterboard on battens/furring | |
| AAC veneer | AAC block or panel, and external finish | cavity and framing | plasterboard |
| AAC external, brick internal | AAC block or panel, and external finish | cavity | brick/masonry and plasterboard |
| Reverse brick veneer | weatherboard, fibre-cement sheet, metal or the like | framing and cavity | brick/masonry |
| Mudbrick or rammed earth | mudbrick or rammed earth | ||
| Insulated concrete form (ICF) | polystyrene formwork and external finish | poured concrete | polystyrene formwork and render |
| External insulated facade system (EIFS) | insulating panel and external finish | framing | plasterboard |
| Other / undecided |
Other detail or not yet decided You need to provide evidence, to the satisfaction of the certifier, that the construction type installed on site meets the total R-value requirements as laid out in the BASIX certificate. For more information about the required evidence, please visit: Certification/CodeMark-Certification-Scheme |
Note: If you wish to use straw bale construction for your dwelling, you will need to use the Simulation method.
Last updated: 26/09/2023