No, ICF forms are made of Type II EPS which is a closed cell foam and does not act like a sponge or absorb water.

Type II EPS has a flame retardant that allows the forms to be flame resistant. The EPS will melt when exposed to sustained temperatures over 300° F. The ignition point of the melted styrene is 600°F (wood is approximately 500°F). Our ICF forms have been tested to meet the building code requirements for flame spread and smoke development. Plus, they are often used as fire resistant rated wall assemblies in schools and hospitals.

The exterior walls are two layers of continuous insulation, the density of solid concrete and a layer of 1⁄2″ gypsum board on the inside all contribute to superior sound suppression of STC 50 for the whole building envelope.

ICF is compatible with all exterior finish materials and systems – siding, stucco, masonry veneer, simulated stone, etc. The attachment of certain exterior finishing systems is recommended with exterior grade screws fastened into the exposed or concealed webs.