Which product is better, open cell foam or closed cell foam?
We know this will probably confuse you more, but it depends. Although some may try to convince you, there is no universal answer. It depends on numerous factors regarding your project, most importantly those of available space in a cavity to be insulated and the moisture environment. In our paper Open Cell vs Closed Cell, we discuss these factors in more detail. In western New York, open cell foam can be used in most projects. As usual, our highly experienced professionals can give you a recommendation.
What are the advantages of flexible foam?
Any foam such as FoamLok™ that adheres to building materials, must remain flexible in order to maintain its air seal. Buildings expand and contract with changes of season and temperature. If the foam is too rigid, it will inevitably develop cracks along the studs and ultimately the air seal will be destroyed. While other types of non-rigid insulation — such as batts and loose fill cellulose — can slip, sag, or settle, leaving uninsulated gaps. Blower door tests have shown that a home insulated with semi-rigid FoamLok™ foam, with no polyethylene vapor barrier, measures 1.2 ACH (air changes per hour) at -50 Pa. depressurization. This is significantly better than the 1.5 ACH rating for the most energy efficient homes.