Already enclosed wall cavities can be retro-fitted with pour in place foam insulation by installing through the exterior or interior. We have developed tools and methods of drilling and finding wall studs to ensure every square inch of wall cavity is filled. No other wall insulation option provides more R-value, air seals and resists moisture better than polyurethane foam insulation. In addition, pour in place polyurethane foam insulation will not settle, sag or change dimensional stability over time.