These hygrothermal simulation results come from using the Wärme und Feuchte Instationär (WUFI) software for a brick masonry wall in Toronto after sprayed polyurethane foam (SPF) insulation is applied directly to the interior side of the brick. Input parameters are derived from material databases and/or calibrated by physical testing on materials in the wall. After 'exposing' the wall section to a year of typical climate conditions in the software model, expected values for temperature, water content, and relative humidity (RH) within the wall section are plotted. The values are then compared to the materials' ability to resist deterioration.