What if I need to run a wire behind the wall in the future?

In the rare event that you need to run a wire down an exterior wall it can be done with FoamLok, but it is more difficult than just slipping it between the fiberglass and drywall. A wire can be forced down a wall with open cell foam (our most commonly used product) or it can be drilled through using very long drill bits from the attic or basement. No matter how you look at it, any expense you have to go through to run a wire down a foamed wall will pale in comparison to the money you will save on energy costs with FoamLok.