Why Ventilation and Moisture Control are Important for Spray Foam Insulation Homes SPRAY FOAM HOME case study YEAR FULL WARRANTY YEAR FULL WARRANTY Spray foam insulation has been increasing in popularity over the last several years. While initial costs are more expensive than traditional insulation, there can be significant long-term energy savings. This is because spray foam is not only an effective insulator, but also a powerful air sealing agent. Sealing restricts air movement through the building envelope. If air moves through insulation, the R-values are diminished. Air sealing also reduces the natural ventilation rate (or air leakage rate), further reducing heating and cooling loads. All sounds good, right? But natural ventilation dilutes the concentration levels of pollut

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