Which is better, open or closed-cell spray foam insulation?
Both systems offer significant advantages over fiber-based insulations: ability to air seal; ability to fill cracks and conform to odd shaped cavities; and ability to hold their shape over time and under adverse conditions. But only closed-cell foam has the thermal insulation value (R-value) to bring your building up to Energy Star® standards with only one-half the thickness required for fiber insulations. In addition, closed-cell foam products increases the strength of your wall system (it’s approximately doubled) and increase the water resistance of your building’s exterior.
