What is ICF?

lnsulated concrete form (ICF) is a system of expanded polystyrene (EPS) rigid insulation blocks separated by plastic webbing. It is used as an integrated concrete form to pour a concrete wall instead of a traditional wood plank or plywood form. ICF blocks come in interlocking sections, so a wall system fits tightly together. Once the blocks are in place, concrete is poured, and finishes like drywall and siding are attached to fastener strips embedded in the insulation.

Several steps of the construction process are made quicker because the insulation and fastener strips are included with the ICF blocks. ICF walls are typically between 6″ and 12″ thick. Wall thickness is often impacted by the soil condition and the amount of support that the overlying parts of a building require.