Injection Foam Saves Money
Most any standing structure have more walls than windows. These window-less areas are often under insulated if insulated at all. Retrofit foam, or foam injected into existing buildings allows the wall cavity to be insulated like never before.
Blown in insulation absorbs moisture and settles leaving void spaces over time.
Fiberglass insulation will not air seal like injected foam, but rather slow the flow of air.
Foam insulation can also be used to fill new and existing block walls and foundations. It helps seal the gaps and holes that provide heat loss.