External Insulated Facade System (EIFS) is an insulating wall panel fixed externally to a frame to form a wall system. The panel has a high inherent insulation (R‑value).
BASIX calculates the R‑value of the wall based on the variable thickness of the insulating panel and adds this to assumed values for air gaps and the plasterboard to determine the R-value of the whole wall.
Diagram showing a section through an External insulated facade system
Insulated Concrete Form (ICF) is a polystyrene (or similar) formwork filled with concrete and rendered to create a wall. The polystyrene formwork has a high insulation (R‑value) and generally does not require additional insulation.
BASIX calculates the R‑value of the wall based on the thickness of the form and the concrete. These values can be obtained from manufacturers of these wall systems.
Diagram showing a section through an Insulated concrete form wall
Autoclaved aerated concrete (AAC) is a lightweight concrete panel or block used as a wall or floor system. Because it is aerated, it has a higher inherent insulation (R‑value) than some other wall or floor systems.
Depending on the thickness of the system and the climate zone, BASIX may determine that you do not need additional insulation.
