Does FoamLok™ absorb water?
No. FoamLok™ is hydrophobic. In fact, if a small piece were to be placed in a bucket of water, it would float for as long as you want to watch it. Upon removal, it would dry rapidly and lose none of its insulating properties.
Does FoamLok™ entrap moisture?
No. FoamLok™ is a breathing foam. Any moisture in the building's concrete or lumber easily escapes through the insulation as the building dries out — thus eliminating any risk of mildew or mold. However, it cannot be applied to wet substrates.
Can FoamLok™ eliminate moisture problems?
Yes. Because air leakage is the culprit, the only way to eliminate moisture problems is to air-seal the building envelope. By eliminating air movement through walls, floors, and ceilings, moisture-laden air cannot pass through and affect the indoor environment. This allows you to control humidity levels to within the 45-50% range — a level at which molds, mildew, dust mites, and many allergens cannot be sustained.
Do I need a Vapor Barrier with FoamLok?
Usually no. FoamLok 2000 closed cell foam is a vapor barrier. FoamLok 500 is somewhat less of a vapor barrier, but its moisture permeability properties in our climate are sufficient for most structures. Our building science professionals can advise you as to which type of foam is best for your project. Since both of these products are air barriers, the conditions for cold and warm air to mix, condense, and cause moisture problems, do not exist if installed properly.