How Much Does Fanfold Insulation Cost?

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Fanfold insulation is an extruded polystyrene foam insulation applied to the exterior of the house.  Fanfold insulation choices should be based on how much insulation you need in a specific area of your house or building.  Its purpose is to provide thermal protection and to form a second barrier between the elements and the framing of your house.  The “R-value” of insulation is the term used to describe the level of thermal protection of a particular insulating material.  For an example, on the interior of the house you will be using an R-19 on the walls and R-30 on the ceilings.  When you choose the fanfold insulation, you have to consider the r-value as well.

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