Insulated concrete form

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.

Insulated Concrete Form (ICF): external polystyrene facade panel, reinforced concrete and internal polystyrene foam.Diagram showing a section through an Insulated concrete form wall